90km Epic race

petit coureur devant le massif du Mont-Blanc
Logo 90km du Mont-Blanc

90km of Mont-Blanc

The 90 Km du Mont-Blanc is a legendary event in the Chamonix-Mont-Blanc valley. With 92 km and 6330 m of positive vertical drop, it is recognized as one of the most technical trails on the French landscape, and although the route is exclusively on hiking trails, these are sometimes narrow and airy.

Some sections of the route are exclusively snow-covered, and runners frequently operate at altitudes of between 2000m and 2500m, requiring a certain degree of acclimatization. The weather can change rapidly in the mountains (wind, precipitation, heat/cold) and running at night can sometimes increase the feeling of difficulty of a passage.

To take part in this race, it is recommended that you have good mountain running experience, are comfortable on all types of terrain, and are self-sufficient for several hours. We draw your attention to the fact that a runner without an UTMB index of over 450 points has very little chance of finishing the race, so it's more advisable to take part in another Mont Blanc Marathon event.

See the list of those selected for the draw

Race route

ULTRA TRAIL in semi-autonomy. Start to ‘Espoir’ Category

Waves : 2 waves of start

Limited to 1000 runners.

Maximum time : 25 hours 

8 full refreshment points

1 refreshment point at the finish

See the interactive map

Download the PDF map

Départ du 90km du Mont-Blanc 2021
Coureurs 90km du Mont-Blanc 2021
Coureurs 90km du Mont-Blanc 2021
Coureurs 90km du Mont-Blanc 2021
Coureuse 90km du Mont-Blanc 2021
Le podium masculin du 90km du Mont-Blanc 2021

Number bib pick-up 

Bib number collection by appointment : Thursday June 27 from 09:00 to 21:00 Place du Mont-Blanc.

For the 90km du Mont-Blanc race number collection, runners must present photo ID and their race bag, which includes all compulsory equipment for the timing chip and equipment check. Race numbers will not be issued to runners who fail to present their bags and equipment.

No race numbers will be issued on the Friday morning before the start of the race.

Compulsory equipment

  • Cell phone. The phone must work and have a subscription adapted to the country(ies).
  • Photo ID.
  • Water supply of at least one liter.
  • Waterproof jacket with hood (gore-tex type) adapted to your size.
  • Warm second-layer garment (with long sleeves) adapted to your size.
  • Headlamp or chest protector with spare batteries.
  • Survival blanket (140cm x 200cm).
  • Whistle.
  • Tumbler.
  • Bowl and spoon

Recommended equipment

  • Cap.
  • Tights.
  • Gloves.
  • Roll of straps.
  • A little money.

Time barriers

The time limits indicated below are given for information only, and may be modified if necessary for the safety of participants. In the event of adverse weather conditions, and for safety reasons, the organization reserves the right to stop the event in progress or modify the time limits. All decisions will be taken by the race jury.

A runner arriving at a time barrier after the deadline will be disqualified. The lower right-hand corner of the race number will be "cut out" by the race marshal, and the runner will be asked to take public transport back to Chamonix. Should the runner wish to continue on the course, his or her number will be collected by the station chief and the runner will no longer be considered a participant in the Mont-Blanc 90km, and will therefore no longer be under the responsibility of the organizer.

Any person disrespecting the volunteers in charge of this function will be permanently banned from all Mont Blanc Marathon events.

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

Download estimated times PDF

Relive past editions of the 90km du Mont-Blanc