Race regulations

The Mont-Blanc Marathon is a sporting event organized by the Club des Sports de Chamonix, a non-profit association under the law of 1901.

These regulations apply to the following events: 90km du Mont-Blanc, 42km du Mont-Blanc, 23km du Mont-Blanc, Kilomètre Vertical du Mont-Blanc, Duo étoilé, Young Race Marathon, 10km du Mont-Blanc, Mini-Cross du Mont-Blanc and the Trail Camp (Salon du Marathon du Mont-Blanc). It has been drawn up in correlation with the FFA (Fédération Française d'Athlétisme) regulations for off-stadium races.

Consult the FFA regulations in PDF

The organizers would like to draw runners' attention to the fact that, depending on the measurement systems and settings used, race routes may give different results.

90km Mont-Blanc

• Semi-autonomous ULTRA-TRAIL, including 8 full refreshment points.
• A 92 km course with 6330 m of ascent and descent. An alternative route is available in the event of bad weather (78 km and around 5000 m of ascent and descent).
• Open to Espoir category and above.
• Limited to 1000 runners.
• Maximum time 25h00.
• Mainly technical mountain trails between 1500 m and 2500 m altitude, with finish in the center of Chamonix.
• UTMB minimum registration index: 450

42km Mont-Blanc

• Semi-autonomous TRAIL, including 3 full feed stations.
• Distance of 42 km with a positive and negative altitude difference of 2540 m.
• Open to Espoir category and above.
• Limited to 2300 runners.
• Maximum time 10h00.
• Course takes in mountain trails between 1000 m and 2200 m altitude, with a finish at Chamonix's Place du Triangle de l'Amitié.
• UTMB minimum registration index: 350

23km Mont-Blanc

• Semi-autonomous SHORT TRAIL, including 2 full refreshment points.
• 23km distance with a positive altitude difference of 1680m and a negative altitude difference of 870m.
• Open to Espoir category and above.
• Limited to 2000 runners.
• Maximum time 6h00.
• Course takes in mountain trails between 1000m and 2000m altitude, with a finish at Planpraz (2000m altitude).
• UTMB minimum entry requirement: 270

Mont-Blanc 10km

• Discovery trail, without intermediate refreshments.
• 10 km on the cross-country ski trails, with a vertical drop of 325m positive and negative.
• Open to Cadets and above.

Star duo

• TRAIL with 2 full refreshment points.
• A duo race, with both participants having to pass the timing points and the finish line together.
• Distance 21 km with a positive and negative altitude difference of approx. 1450 m.
• Open to Espoir category and above.
• Maximum time 6h30.

KM Vertical du Mont-Blanc

• Race against the clock.
• Distance of 3.8 km with a positive vertical drop of 1000 m.
• Open to juniors and above.
• An alpine race, the end of the course is an aerial via ferrata (steps, cables, handrails...), with a finish at 2000m (Planpraz).

Young Race Marathon

• Discovery trail reserved for U18 and U20 categories.
• U18 category: 7 km distance with a positive and negative altitude difference of 644 m / finish refreshments.
• U20 category: 13 km with a positive and negative altitude difference of 1,200 m / intermediate and finish refreshments.
• The course follows mountain trails at altitudes of between 1,000m and 2,200m, starting and finishing in Chamonix.

Mini-Cross du Mont-Blanc

• Discovery race for children.
• No timing, no ranking based on speed.
• Course from 800m to 3km depending on age (Ecole d'athlétisme to Minimes categories), taking place in the Bouchet woods.

Registration for the Mont Blanc Marathon races is online only, with payment by credit card. Registration methods differ depending on the race:

90km, 42km, 23km and Duo Etoilé : Registration opens on Thursday, October 24 at 9:00 am.

There are two options depending on your mode of transport:

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I'm coming by train or bus: I register without going through the draw.

40% of race numbers are involved. The number of race numbers is limited: first come, first served. More info

I'm coming by another means of transport: I register for the draw (free of charge).

This applies to 60% of race numbers. Registration for the draw is possible from Thursday, October 24, 2024 at 9:00 am until Tuesday, November 12, 2024 at 12:00 pm.

It is only possible to register for one of the 4 races in the draw.

The results of the draw will then be communicated by email to those who have registered. The selected runners will then have to finalize their registration and the payment of their race number before November 29, 2024 at 12:00 pm. More info

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10km, Kilomètre Vertical, Young Race Marathon and Mini-Cross: Registration opens on Wednesday November 20 at 9:00 am.

Registration without draw until all places are filled.

Runners wishing to take part in the 10km du Mont-Blanc, the Kilomètre Vertical, the Young Race Marathon or the Mini-Cross can register without a draw for one or more races, while places last.

As for the races subject to a draw, 40% of the race numbers for the Mont-Blanc 10km and KM Vertical will be reserved for runners who commit to coming by train or bus. Runners must therefore choose the mode of transport they will use to get to Chamonix when they register.

• 10km du Mont-Blanc: 800 numbers reserved for Bus / Train.
• KM Vertical: 280 race numbers reserved for Bus / Train.

Conditions for train and bus race numbers:

• More than half of the journey (home-Chamonix) must be made by train or bus.

• The train or bus ticket must be for a return journey including the date of the event.

• Runners who choose to take part in this scheme will be required to upload their ticket and proof of address to their runner account by May 4, 2025 at the latest.

• For residents of the Chamonix Valley, the Viacham card will act as proof of transport (and will therefore replace the train or bus ticket). It must be uploaded to the rider's registration profile with a validity date covering the period of the event.

• In the event of non-uploading or proven fraud, registration will be cancelled without refund.

Registration for the Mont Blanc Marathon is open to licensed and non-licensed runners of all nationalities, whose age corresponds to the FFA category/distance criteria.

More information on FFA categories

Each competitor must be in possession of personal accident insurance covering search and evacuation costs in France and Switzerland (90km). Such insurance can be taken out withAssur-Connect, for one, two, seven days or one year. Helicopter evacuations in Switzerland are subject to a fee, as are private helicopter evacuations in France. The choice of evacuation depends exclusively on the organization, which will always give priority to the safety of the runners. It is therefore up to each runner to check that his or her insurance covers these arrangements (the Mont Blanc Marathon organization is not authorized to provide information on your coverage).

Runners in possession of a valid FFA license or Pass J'aime courir who have chosen the Personal Accident option when purchasing their license or pass are automatically covered by the insurance of the Fédération Française d'Athlétisme.

Take out personal accident insurance

Age categories 2025 :

• U10 Eveil Athlé : 7 to 9 years old / 2016 to 2018
• U12 Poussins : 10 to 11 years old / 2014-2015
• U14 Benjamins : 12 to 13 years old / 2012-2013
• U16 Minimes: 14 to 15 years old / 2010-2011
• U18 Cadets: 16 to 17 years old / 2008-2009
• U20 Juniors: 18 to 19 years old / 2006-2007
• U23 Espoirs: 20 to 22 years old / 2003 to 2005
• Seniors: 23 to 34 years / 1991 to 2002
• Masters: 35 and over / 1990 and earlier

Masters :

• M0 : 1986-1990
• M1 : 1981-1985
• M2 : 1976-1980
• M3 : 1971-1975
• M4 : 1966-1970
• M5 : 1961-1965
• M6 : 1956-1960
• M7 : 1951-1955
• M8 : 1946-1950
• M9 : 1941-1945
• M10 : 1940 and earlier

Registrations are made exclusively over the Internet, via secure credit card payment. Registration fees include all services described in the present regulations.

By registering, each runner makes the following personal commitments:

• I declare that I have fully understood the rules and ethics of the race.
• I understand and accept the conditions of participation set out in these rules.
• I undertake to abide by the rules in all respects.
• I declare that I hold personal accident insurance covering rescue, search and evacuation costs in France and Switzerland.
• I declare that I have informed myself of any medical contraindications that may apply to me and, consequently, release the organization from any medical problems that may arise during the event as a result of negligence on my part.
• I declare that I have completed the Health Prevention Course (PPS), or a health questionnaire for minors, and that I have informed myself of any medical contraindications that may apply to me, and therefore release the organization from any medical problems that may arise during the event.
• I agree to submit to any fixed or random checks that may be carried out along the route, and to any decisions that may be taken against me.

All registrations are personal, firm and final, and cannot be reimbursed for any reason whatsoever (except for those who have taken out cancellation insurance at the time of registration):

• No transfer of registration, nor any exchange, donation or resale of race numbers between individuals is permitted for any reason whatsoever, before, during or after the event.
• Any exchange of race numbers will result in immediate disqualification of the runner and a 10-year ban on re-registration for Mont Blanc Marathon races.
• Any person transferring their race number or registration to a third party will have their registration cancelled and will be held responsible in the event of an accident occurring or caused by the third party during the event. The organization declines all responsibility in the event of an accident of this type.
• Any person holding a race number or registration acquired in breach of the present regulations will be disqualified without reimbursement.
• Any runner caught in the act of exchanging, donating or reselling a race number will have his or her registration cancelled without refund, and will be barred from re-registering for Mont Blanc Marathon races for a period of 10 years.

In application of the law of March 2, 2022 aimed at democratizing sport in France, the French Athletics Federation has decided to replace the requirement for a medical certificate of no contraindication, with an educational and information course on the health risks associated with the practice of athletics, called the "(or "PPS").

Already applicable to all FFA adult licensees since September 2023, this obligation now applies to all practitioners adults who wish to register for a race, who will have to satisfy the Health Prevention Course within three (3) months prior to the event concerned.

On the other hand, the rules have not been changed for minors, who must still present a valid license or complete a health questionnaire and present a medical certificate.

These regulations apply to all persons wishing to register for the Marathon du Mont-Blanc 2025, whether of French or foreign nationality.

It is the responsibility of each runner to complete and check the status of his or her registration on his or her runner's space.
If the runner's registration file is not completed and validated by the deadline, he or she will not be able to collect his or her race number and will not be able to start the race.

Registration for the Mont Blanc Marathon races is online only, with payment by credit card. Registration methods differ depending on the race:

90km, 42km, 23km and Duo Etoilé : Registration opens on Thursday, October 24 at 9:00 am.

There are two options depending on your mode of transport:

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I'm coming by train or bus: I register without going through the draw.

40% of race numbers are involved. The number of race numbers is limited: first come, first served. More info

I'm coming by another means of transport: I register for the draw (free of charge).

This applies to 60% of race numbers. Registration for the draw is possible from Thursday, October 24, 2024 at 9:00 am until Tuesday, November 12, 2024 at 12:00 pm.

It is only possible to register for one of the 4 races in the draw.

The results of the draw will then be communicated by email to those who have registered. The selected runners will then have to finalize their registration and the payment of their race number before November 29, 2024 at 12:00 pm. More info

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10km, Kilomètre Vertical, Young Race Marathon and Mini-Cross: Registration opens on Wednesday November 20 at 9:00 am.

Registration without draw until all places are filled.

Runners wishing to take part in the 10km du Mont-Blanc, the Kilomètre Vertical, the Young Race Marathon or the Mini-Cross can register without a draw for one or more races, while places last.

As for the races subject to a draw, 40% of the race numbers for the Mont-Blanc 10km and KM Vertical will be reserved for runners who commit to coming by train or bus. Runners must therefore choose the mode of transport they will use to get to Chamonix when they register.

• 10km du Mont-Blanc: 800 numbers reserved for Bus / Train.
• KM Vertical: 280 race numbers reserved for Bus / Train.

Conditions for train and bus race numbers:

• More than half of the journey (home-Chamonix) must be made by train or bus.

• The train or bus ticket must be for a return journey including the date of the event.

• Runners who choose to take part in this scheme will be required to upload their ticket and proof of address to their runner account by May 4, 2025 at the latest.

• For residents of the Chamonix Valley, the Viacham card will act as proof of transport (and will therefore replace the train or bus ticket). It must be uploaded to the rider's registration profile with a validity date covering the period of the event.

• In the event of non-uploading or proven fraud, registration will be cancelled without refund.

Duo Étoilé, 23 km, 42 km and 90 km du Mont-Blanc: No draw for runners who commit to coming by train or bus

40% of race numbers concerned:

• 90km: 400 race numbers

• 23km: 800 race numbers

• Star duo: 200 race numbers

• 42km: 920 race numbers

The number of race numbers is limited: first come, first served.

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Conditions for train and bus numbers:

• More than half of the journey (home-Chamonix) must be made by train or bus.

• The train or bus ticket must be for a return journey including the date of the event.

• Runners who choose to take part in this scheme will be required to upload their ticket and proof of residence to their runner account by May 4, 2025 at the latest.

• For residents of the Chamonix Valley, the Viacham card will act as proof of transport (and will therefore replace the train or bus ticket). It must be uploaded to the runner's registration profile with a validity date covering the period of the event.

• In the case of the Star Duo, both riders must upload their tickets. In the event of a rider being replaced on the team, the replacement rider must also provide proof of his or her status.

• In the event of non-downloading or proven fraud, registration will be cancelled without refund.

• Group entries are not available for this registration method. They are only possible via the draw.

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Duo Étoilé, 23 km, 42 km and 90 km du Mont-Blanc: I'm entered in the draw because I use a means of transport other than the train or bus to get to Chamonix.

I register for the draw (free of charge) from Thursday, October 24, 2024 at 9:00 am to Tuesday, November 12, 2024 at 12:00 pm.

60% of race numbers are available for this registration method:

• 90km: 600 race numbers

• 23km: 1200 race numbers

• Star duo: 300 race numbers

• 42km: 1880 race numbers

Draw procedures:

• Runners wishing to take part in the draw must choose just one of the four races: 90km, 42km, 23km or Duo étoilé.
• It is forbidden to enter the draw more than once. Any runner attempting to enter the draw more than once will have all his or her entries automatically cancelled, and will therefore not be able to enter the draw.
• Registration for the draw will be possible from October 24, 2024 at 9:00 am to November 12, 2024 at 12:00 pm. If the number of pre-registrations for a race is greater than the maximum number of runners possible, the draw will be organized.
• Results will be announced on November 18 from 9:00 am.

Group registration Group pre-registration is possible for the 90km, 42km or 23km Mont-Blanc. More info

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Group pre-registration is possible for the 90km, 42km or 23km Mont-Blanc.

• Group registrations must be for the same race (minimum 2 people and maximum 10 people per group).
• Group registrations are only possible in the case of a random draw.
• If a group consists of more than 10 people, it will not be entered in the draw.

The only advantage of group registration is that all group members have the same draw result, whether positive or negative. The probability of being drawn is the same for all riders, whether pre-registered individually or as a group. Each group member must fill in the "group code" information on the registration form. The code must be created by the 1st member of the group to register and then passed on to the other members of the group. It is then up to the group leader to know who makes up his or her group.

Be very careful when entering the group code, as in the event of a code error, group members will not be grouped together under the same group. We recommend that you do not use spaces or special characters in the group name, only capital letters and numbers. Example of a group code: MBM189 (this is an example, please do not use this code).

Participants who so wish can take out "cancellation" insurance when registering for one of the Mont Blanc Marathon races, the conditions of which can be consulted via this link. This option must be taken out before registration is validated. This option allows the participant, under certain conditions established by the insurer, to be reimbursed for the registration fees paid.

If the rider has not taken out cancellation insurance at the time of registration, he/she will not be able to claim a refund from the organization.

Personal accident insurance

Each competitor must be in possession of personal accident insurance covering search and evacuation costs in France and Switzerland (90km). Helicopter evacuations in Switzerland are subject to a fee, as are evacuations in France by private helicopter. The choice of evacuation depends exclusively on the organization, which will always give priority to the safety of the runners.

Such insurance can be taken out with Assur-Connect by clicking here : Take out insurance

Our partner Assur Connect's insurance covers: medical repatriation on the basis of actual costs, medical expenses, helicopter evacuation costs and, for EU residents, death and disability benefits, as well as runners' personal liability. For further information contact@assurconnect.com or +33 01 85 73 31 15.

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Personal liability

In accordance with current legislation, the organizer has taken out insurance covering the financial consequences of his civil liability, that of his employees and that of all participants in the Mont Blanc Marathon. As far as the civil liability of participants is concerned, this insurance is limited to accidents they may cause during the running of the Mont Blanc Marathon. This cover is in addition to, or in default of, any other insurance that participants may have. Proof of insurance can be provided to any participant on request.

Material damage

The organizer declines all responsibility in the event of damage (theft, breakage, loss, etc.) to participants' personal property, even if it is under the organizer's supervision. The participant, in his capacity as owner, expressly agrees to retain custody of his personal property during the event. This includes, in particular, any damage to the participant's personal belongings while they are being left in the relief bags provided for runners by the organizer. Participants cannot claim against the organizer for any damage to their equipment. It is the responsibility of each participant to take out insurance to cover these risks.

Race changes are only possible if there are still places available in the race concerned, and only to change :

• From 90km to KM Vertical or 10km.
• From 42km to KM Vertical or 10km.
• From 23km to KM Vertical or 10km.
• From Duo étoilé (for one member of the pairing in the event of injury to his/her partner) to KM Vertical or 10km.
• KM Vertical to 10km
• From the Young Race Marathon to the 10km.

Any other change of race is not possible.

In this case, the runner must inform the organization in writing before April 30, 2025, so that we can make a new allocation of race number. No refunds will be made.

For any request for a change of race, only the runner concerned may expressly make this request in writing (email or post). Requests made by a person other than the runner will not be valid.

Only one request for a change of team-mate in the Star Duo is possible, provided that this request is made before April 30, 2025.

To do so, the rider wishing to be replaced must send an email to the organization notifying his wish and including all information relating to the person who will replace him. Only one change per team is possible. No refunds will be given; riders must make their own arrangements. Following this change, we cannot guarantee that we will be able to supply a t-shirt corresponding to the size requested by the replacement rider.

Norider may be replaced within a team, for any reason whatsoever, after April 30, 2025.

• Any exchange of bib numbers between runners will result in immediate disqualification of the team and a 10-year ban on re-registration for Mont Blanc Marathon races.
• All registrations are personal, firm and final, and cannot be reimbursed for any reason whatsoever (except for those who have taken out cancellation insurance at the time of registration).
• Any person transferring their race number to a third party will be held responsible in the event of an accident occurring or caused by the third party during the event. The organization declines all responsibility in the event of such an accident.
• Any person holding a number acquired in breach of the present regulations will automatically disqualify the pair without reimbursement.
• Any runner caught in the act of reselling a race number will have his or her registration and that of his or her partner cancelled without refund, and will be barred from registering for Mont Blanc Marathon races for 10 years.

Bib numbers must be fully legible during the race.

For the 90km, 42km and 23km of Mont-Blanc, the starting SAS are set up according to the runner's UTMB index, approximately 1 month before the race. A runner with no UTMB index will be assigned to the last SAS start. A runner whose UTMB index has changed between the time of the SAS assignment and race day will not be able to change SAS.

For the Mont-Blanc 10km, the start SASs will be assigned according to the time estimated by the runner to complete the race at the time of registration. The allocation of runners to the SAS will take place approximately one month before the date of the race.

No claims can be made to the organization regarding the allocation of SASs: by registering, runners agree to accept the SAS to which they will be allocated on race day.

Numbers will be handed over by appointment only at Place du Mont-Blanc in Chamonix. The runner must choose a time slot via the email sent by the organization in the month preceding the race. No race numbers will be issued outside this time slot.

At the time of race number collection, runners must bring their race bag with them, including all the equipment required for the timing chip and equipment check. Numbers will not be issued to runners who do not present their race bag and the compulsory equipment for the race in which they are entered.

Each race number is given to the runner in person, on presentation of photo identification. Without this document, the number will not be issued. Runners must know their race number before picking it up.

Specific details of race number collection for each race:

• 90km du Mont-Blanc : No race numbers distributed on the Friday morning before the start of the race.
• KM Vertical : Numbers can be collected on Thursday and no later than one hour before the start of the race.
• 23km du Mont-Blanc: No race numbers distributed on Saturday morning before the start of the race.
• Mini Cross: Pick-up of race numbers on Thursday and Friday at Place du Mont-Blanc, or on Saturday from 9:00 am to 2:00 pm at the VML stand. No numbers distributed after 2:00 pm on Saturday.
• 10km du Mont-Blanc: No race numbers distributed after 9.30am on Saturday morning.
• Young Race Marathon: No race numbers distributed after 1:00 pm on Saturday.
• Duo étoilé: No race numbers distributed after 6:00 pm on Saturday.
• 42km du Mont-Blanc: No race numbers distributed on Sunday morning before the start of the race.

It is up to runners to check the number collection times for the race they are taking part in when they register, in order to plan their arrival in Chamonix according to their number collection slot.

The list of equipment below complies with the specific trail rules published by the FFA. Each runner undertakes to possess the safety equipment stipulated in the present regulations throughout the event (before the start, during the race, in the finish area).

Checks may be carried out at any time during the event to ensure that the race runs smoothly. The runner is obliged to submit to these checks with cordiality; in the event of refusal to be checked or in the event of non-compliance with the penalty applied, the runner will be disqualified.

Compulsory equipment must also be presented by the runner when collecting his race number. Failure to do so will result in the race number not being issued.

90km du Mont-Blanc

Compulsory equipment :

• Cell phone in working order, with a subscription that works in France and Switzerland.
• Minimum 1-liter water supply.
• Waterproof jacket with hood (gore-tex type) adapted to your size.
• Warm, long-sleeved second-layer garment, adapted to your size.
• Head or chest lamp with spare batteries.
• Survival blanket (140cm x 200cm).
• Whistle.
• Tumbler.
• Identification.
• Bowl and spoon.
• Cash.

Recommended equipment:

• Cap.
• Tights.
• Gloves.
• Roll of straps.

Poles are permitted on the Mont-Blanc 90km. If you choose to take poles, you must do so for the duration of the race. It is forbidden to start without poles and to pick them up along the way.

42km du Mont-Blanc, 23km du Mont-Blanc & Young Race Marathon

Compulsory equipment :

• Cell phone in working order.
• Minimum 0.50-liter water supply.
• Waterproof jacket with hood (gore-tex type) adapted to your size.
• Whistle.
• Survival blanket (140cm x 200cm).
• Tumbler.
• Cash.

Recommended equipment depending on weather conditions:

• Hat.
• Tights.
• Gloves.
• Roll of straps.
• Bowl and spoon.

Poles are allowed on the 42km, 23km and Young Race Marathon. If you choose to take poles, you must do so for the duration of the race. It is forbidden to start without poles and to pick them up along the way.

Star duo

Compulsory equipment (for each runner) :

• Cell phone in working order.
• Minimum 0.50-liter water supply.
• Waterproof jacket with hood (gore-tex type) adapted to size.
• Working headlamp or chest lamp with spare batteries.
• Survival blanket (140cm x 200cm).
• Whistle.
• Tumbler.

Recommended equipment:

• Hat.
• Tights.
• Gloves.
• Bowl and spoon.

Sticks are permitted on the Duo étoilé. If you choose to take poles, you must do so for the duration of the race. It is forbidden to start without poles and to pick them up along the way.

KM Vertical & 10km du Mont-Blanc

Compulsory equipment:

• Minimum 0.50-liter water supply
• Tumbler.

Recommended equipment depending on weather conditions:

• Waterproof jacket (Gore-tex type).

Please note that poles are not allowed on these races.

Accompanying persons are not allowed in the refreshment area. Individual assistance of runners is only permitted 100 metres before or 100 metres after the refreshment posts. Outside these zones, it is forbidden, as is assistance during the race.

Any assistance provided outside the authorized zones will result in a time penalty being applied to the riders receiving the assistance.

It is strictly forbidden to start a race accompanied by a baby or child.

The Mont Blanc Marathon races are run semi-autonomously. Semi-autonomy is defined as the ability to be self-sufficient between two refreshment points, in terms of food, clothing and safety equipment, enabling the runner to adapt to foreseeable or unforeseen problems (weather changes, physical problems, injuries, etc.).

It is up to runners to estimate their food and water requirements between two refreshment points. The quantity of water specified in the list of compulsory equipment is a minimum quantity to be provided.

Two types of refreshments are available:

• During the race: Soup, bread, tomme, sausage, sweet cakes, Tucs, oranges, bananas, apricots, watermelon (if very hot) + MX3 energy bars (90km, 23km, 42km). Still water, sparkling water with electrolytes
  MX3, sparkling water with mint syrup and Coca-Cola, tea (if bad weather). MX3 energy drink (90km, 42km). Additional food for the 90km only: röstis at the Emosson refreshment station from 11am to 3pm, pizzas at the Les Bois refreshment station from 6pm to 10pm, pasta at the Montenvers refreshment station from 6pm to 8pm.
• On arrival: Hot dogs (vegetarian option available), soup, tomme, sweet cakes, oranges, apricots, watermelon (if hot). Still water, sparkling water with mint syrup and Coca-Cola, tea (if bad weather), MX3 recovery drink (90km, 42km).

Waste sorting and composting garbage cans are provided in large numbers at each feed station and must be used. Any runner seen deliberately littering the course will be penalized.

Individual assistance is only permitted 100 metres before and 100 metres after the refreshment posts. Outside these zones, it is forbidden, as is assistance during the race.

Only runners wearing a visible race number and duly checked have access to the refreshment posts.

The race number must be visible throughout the entire race. It must be worn on the chest or stomach; it is forbidden to place the number on the back or on the rucksack. The use of a number belt is permitted.

For runners of the Kilomètre Vertical and 23km du Mont-Blanc, who make a request at the time of registration, the organizer offers to transport their belongings to the race finish in Planpraz. Only one bag per runner can be requested. This will be provided by the organizers at the time of number collection, provided that the runner has requested it at the time of registration.

The organizer declines all responsibility for any loss, theft or damage to participants' personal belongings in the bags (it is recommended not to place valuables in the bags). Participants' belongings will be transported to the finish only if they are in the bag provided by the organizer.

In the event of a runner abandoning the race, the bag containing his or her belongings will be returned to Race HQ located at the Club des Sports de Chamonix, 99 avenue de la Plage, 74400 Chamonix, within a minimum of one hour of the abandonment being reported to Race HQ.

No lightening bags are available for the other races of the Mont Blanc Marathon. It is the responsibility of each runner to make their own arrangements for transporting or storing their belongings.

In the event of adverse weather conditions, and for safety reasons, the organization reserves the right to modify the time limits or to stop the event in progress. All decisions will be taken by the race jury.

Maximum race times and time limits take account of any delays (traffic jams, equipment checks, waiting at refreshment points, etc.).

Time limits are imperative and their application is non-negotiable. If a runner arrives after a time barrier has been applied, he or she is out of time and will be disqualified. The bottom right-hand corner of the runner's number will be cut off by the member of the organization in charge of the time barrier and the runner will be invited to return home by his own means or by the means set up by the organization.

If the runner wishes to continue the race despite his disqualification, his number will be recovered by the organization and the runner will no longer be considered a participant in the Mont Blanc Marathon; he will therefore no longer be under the responsibility of the organizer.

If you cross the finish line after the maximum race time, you will not be classified and therefore will not be considered a finisher.

Anyone disrespecting the members of the organization responsible for enforcing the time limits will be banned from all Mont Blanc Marathon events.

In the case of a multi-wave start, time limits are applied from the start time of the last wave. The maximum race time is calculated according to each runner's start time.

90km Mont-Blanc

Maximum race time: 25 hours

• La Flègère (km 18): Start time of last wave + 4h30 race.
• Le Buet feed station (km 27): Start time of last wave + 6h30 race.
• La Villaz (km 38): Start time for last wave + 9 hrs race.
• Emosson feed station (km 43): Start time for last wave + 11:00 race.
• Le Châtelard (km 47): Start time for last wave + 12:00 race.
• Ravitaillement du Tour (km 62): Start time for last wave + 16:15 race.
• Ravitaillement des Bois (km 72): Start time of last wave + 18:30 of race.
• Montenvers feed station (km 78): Start time for last wave + 9:00 pm race.
• Plan de l'Aiguille refuge refreshment point (km 83): Start time for last wave + 23:00 race.
  

42 km of Mont-Blanc

Maximum race time: 10 hours

• Tour feed station (km 12.5): Start time for last wave + 2h45 race.
• Vallorcine feed station (km 22.2): Start time of last wave + 5h30 of race.
• La Flégère feed station (km 32.8): Start time for last wave + 8h30 race.
  

23km Mont-Blanc

Maximum race time: 6 hours

• Montroc feed station (km 12): Start time of last wave + 2h30 of race.
• La Flégère feed station (km 18): Start time of last wave + 4h30 race.
  

Star duo

Maximum race time: 6 hours 30 minutes.

• Chemin Caillet junction (km 4.5): start of last wave + 1h15 race.
• Montenvers refreshment point (km 7): start of last wave + 2hrs 30min race.
• Plan de l'Aiguille refuge refreshment point (km 13): start of last wave + 4h30 of race.
  

10km du Mont-Blanc,

Maximum race time: 2h30

No time limits.

Young Race Marathon,

Information to come

Km Vertical and Mini-Cross

No time limits.

A maximum race time is set for each event in the Mont Blanc Marathon. The maximum race time takes into account any delays on the course (traffic jams, equipment checks, waiting at refreshment points, etc.).

Runners crossing the finish line after the maximum race time will not be classified and will not be considered as finishers.

The maximum race time is calculated according to each runner's start time. In the case of a wave start, the maximum race time is calculated according to the start time of your wave. Time barriers are calculated according to the start time of the last wave.

Maximum times for each race:

• 90km du Mont-Blanc : 25h00
• 42km Mont-Blanc: 10h00
• 23km Mont-Blanc : 6h00
• Duo étoilé: 6h30
• Young Race Marathon: U18 2h00 / U20 3h00
• Mont-Blanc 10km: 2h30
• Km Vertical: no time limit
• Mini-Cross: no time limit

In the event of withdrawal, the competitor must notify a member of the organization (refreshment station attendant, race closing officer, first-aid attendant, etc.), giving his or her race number. If there is no member of the organization near the runner who is retiring, the latter must contact race HQ to report his retirement. The Race HQ number is noted on the competitor's bib.

In the event of withdrawal, the lower right-hand corner of the race number will be cut off by the member of the organization and the runner will be invited to return home by his own means or by means set up by the organization. The runner will then no longer be considered a participant in the Mont Blanc Marathon, and will no longer be under the responsibility of the organizer.

Any person disrespecting the members of the organization responsible for collecting withdrawals will be permanently banned from all Mont Blanc Marathon events.

For the Duo Etoilé, if one of the two runners in the duo wishes to withdraw, his or her team-mate must also withdraw. It will not be possible to continue the race alone.

Permanent members of the organization, race marshals and checkpoint and refreshment post marshals are empowered to enforce compliance with the regulations (*).
They may immediately apply a penalty or disqualification measure in the event of non-compliance with the regulations, in accordance with the following table:

(*) Any other breach of the rules will be subject to a penalty decided by the race jury.

It is strictly forbidden to start a race with an animal, or to be accompanied by an animal during the race.

Accompanying animals are not allowed in the refreshment area. They must be kept on a leash in the vicinity of the refreshment posts, in the accompanying shuttles, or along the entire course that is not located in the Aiguilles Rouges Nature Reserve.

Dogs and other domestic animals are strictly forbidden on sections of the course that cross the Aiguilles Rouges Nature Reserve.

First-aid posts are set up at several points along the course. These posts are linked by radio or telephone to Race HQ and Emergency HQ. A medical team will be present throughout the event, and will be able to intervene on the course by any appropriate means, including by helicopter if necessary.

It is the responsibility of any runner in difficulty or seriously injured to call for help:

• By going to an aid station,
• By calling PC Secours (number noted on runners' bibs),
• By asking another runner or someone nearby to call for help.

It is the responsibility of each runner to provide assistance to any person in danger and to notify the emergency services. Any problem or accident must be reported immediately to the nearest control post.

Don't forget that hazards of all kinds, linked to the environment, weather conditions and the profile of the race, may mean that you have to wait longer than expected for help. Your safety will then depend on the quality of what you've packed in your bag.

A runner who calls on the services of a doctor or first-aider submits to their authority and agrees to accept their decisions. First-aid attendants and race doctors are empowered :

• Remove from the race any competitor physically unable to continue.
• Evacuate any runner they deem to be in danger by any means at their disposal.
• Hospitalize any runners whose state of health so requires.

Expenses arising from the use of exceptional means of rescue or evacuation will be borne by the person rescued, who must also ensure his or her return from the place where he or she was evacuated. It is the rider's sole responsibility to set up and submit a claim to his personal insurance company within the allotted time.

If you are unable to contact the rescue centre, you can call the emergency services directly (especially if you are in an "emergency only" zone): 112 from France.

An official race jury is appointed. The jury's power of decision is final, and it may be called upon to postpone or cancel one or more races, depending on weather conditions. The jury is made up of one member from each of the following organizations:

• First-aid center
• Chamoniarde
• Chamonix Sports Club
• CNEAS
• Croix Blanche
• Croix Rouge
• Dokever
• EMHM
• Chamonix Town Hall
• Vallorcine Town Hall
• Coordinating doctor

As the president of the jury is the race director, it is he who will make the final decision following consultation with the jury members.

In the event of excessively unfavorable weather conditions (large quantities of rain and snow at high altitudes, high risk of thunderstorms, etc.) and following the decision of the race jury, the organization has the right to modify start times, courses and race time limits. Runners will be notified of these changes by text and email. All information will also be posted on the event website and available at the information point located on the Place du Mont-Blanc during the event.

In the event of "force majeure": weather conditions (orange or red weather alert) preventing competitive running, natural disasters (earthquake, storm) or major political events (revolution, war, terrorist attacks) excluding pandemics, forcing the organizer to postpone the race, runners unable to take the start of the postponed race may request a refund of 60% of the registration fees actually received.
The following will not be reimbursed: donations to associations, cancellation insurance, subscriptions to RunMotion Coach, carbon offsetting and bank processing costs.

To benefit from this reimbursement, you must make a request on your registration profile before July 15, 2025. The refund will be made by crediting your credit card again within two months of your request.

Before the start of the race

In the event of "force majeure": weather conditions (orange or red weather alert) preventing competitive running, natural disasters (earthquake, storm) or major political events (revolution, war, attacks) excluding pandemics, forcing the organizer to cancel the event, 60% of the registration fees actually paid will be refunded.
The following will not be refunded: donations to associations, cancellation insurance, subscriptions to RunMotion Coach, carbon offsetting and bank processing costs. Refunds will be made by crediting your credit card.

During the races

In the event of "force majeure", the organizer may stop the race. In this case, runners arriving at a refreshment or control point must follow the instructions given by the volunteers, and are obliged to respect them. No refund can be claimed.

• For the 90km and 42km, prizes will be awarded to the first ten men and the first ten women overall, as well as to the first three men and the first three women in each age category represented in the race.
• For the 23km and 10km, prizes will be awarded to the first three men and the first three women overall, as well as to the first three men and the first three women in each age category represented in the race.
• For the KMV, prizes will be awarded to the first ten men and the first ten women overall.
• For the Duo étoilé, the first three men's teams, the first three women's teams and the first three mixed teams will be rewarded.
• For the Young Race Marathon, the first three men and the first three women in the relevant categories will be rewarded.
• For the Mini Cross, the first boys and girls in each age category will be rewarded.

Prize Money

The amounts are currently being worked out.

90km du Mont-Blanc :

• 1st man / 1st woman
• 2nd man / 2nd woman
• 3rd man / 3rd woman

KM Vertical :

• 1st man / 1st woman
• Men's record time
• Women's record time

42km Mont-Blanc :

• 1st man / 1st woman
• 2nd man / 2nd woman
• 3rd man / 3rd woman

Each participant expressly authorizes the organizers of the Mont Blanc Marathon and their assignees, such as licensees, partners and the media, to use still or audiovisual images in which he or she may appear, taken during participation in the Mont Blanc Marathon races or at Trail Camp, in all media, including promotional and/or advertising documents, throughout the world and for the longest period provided for by law, regulations and treaties in force, including any extensions that may be made to this period.

In the case of a minor who has not signed a waiver, registration for the Mini-Cross implies parental consent to the use of the minor's images.

Le Club des Sports de Chamonix est organisateur d’une manifestation sportive dénommé « Marathon du Mont Blanc » qui se déroule le dernier week-end de juin de chaque année. En application des dispositions de l’article L 333-1 du Code du Sport, le Club des Sports de Chamonix est le propriétaire exclusif du droit d’exploitation de cette manifestation.

Dans ce cadre, le Club des Sports de Chamonix est seul titulaire du droit à l’image de chacun des concurrents participants à la manifestation, qui ont renoncé à s’en prévaloir par adhésion expresse lors de leur inscription.
Toute communication sur l’évènement ou utilisation d’images de l’évènement devra se faire dans le respect du nom de l’évènement, des marques déposées et avec l’accord officiel de l’organisation. En conséquence, seule l’organisation est titulaire du droit d’utiliser l’image des coureurs et peut transmettre ce droit.

A défaut de souscription d’une licence d’exploitation auprès du Club des Sports de Chamonix, la captation et l’utilisation d’image est strictement interdite. Cela signifie que l’utilisation de toute image en course présentant des coureurs est soumise à une licence délivrée uniquement par le Club des Sports de Chamonix.

In accordance with the French Data Protection Act of January 6, 1978, and the EU General Data Protection Regulation 2016/679, which came into force on May 25, 2018, each participant has the right to access and rectify personal data concerning him or her.

Pursuant to these provisions, the participant is entitled to object to the processing of his or her personal data, to request the rectification of his or her data, to object to the receipt of commercial prospecting, to request the deletion of his or her personal data, and finally to access his or her personal data. All these rights can be exercised by sending an e-mail to club@chamonixsport.com.

In general, the personal data communicated by participants is intended for the authorized personnel of the organizer.

Before and after the event, information relating to your sporting performance and/or your registration (in particular your results, photos and videos) are published on the Mont Blanc Marathon website. Your results in the draw and/or the races in which you have participated, together with your surname, first name and region, may be published by any media. If you wish to object to such publication for a legitimate reason, you must inform the organizer of this decision at club@chamonixsport.com, prior to the event and no later than thirty (30) days before the event, so that the appropriate measures can be taken.

Data is kept for a period of three (3) years from the end of the event. At the end of this retention period, the organizer will temporarily archive the data for the longest period of legal prescription applicable to this type of service. Access to them will then be strictly limited to use within a legal or judicial framework.

Purchase of leisure services or personalized products:

Leisure services" means the purchase of a race number. The participant does not benefit from a right of withdrawal on the purchase of leisure services that must be provided on a specific date or according to a specific frequency, in accordance with the following legal provisions of article L. 121-20-4 of the French Consumer Code:

"The provisions of articles L. 121-18, L. 121-19, L. 121-20 and L. 121-20-1 are not applicable to contracts whose object is :

[...] 2° The provision of accommodation, transport, catering or leisure services which must be provided on a specific date or at a specific time.
The provisions of articles L. 121-18 and L. 121-19 are, however, applicable to contracts concluded by electronic means when their object is the provision of the services mentioned in 2".

The same applies to personalized products such as engraved medals, pursuant to the provisions of article L. 221-28 of the French Consumer Code.

These regulations may be modified at any time and without prior notice by the organizing team of the "Marathon du Mont-Blanc" event, up until the day before the start of the first race. Any new version of the rules will be posted on the event website www.montblancmarathon.fr.