CHOOSE
your race
The Mont Blanc Marathon courses are situated in mountain terrain, on technical trails with a lot of positive differences of heigth.
To participate in the races it is recommended to have a good mountain experience, be at ease in every kind of trail and to be able to in autonomy during several hours.
It is generally considered than 100m of positive difference of heights are equivalent to 1 additionnal kilometer.
Example: Mont-Blanc 42kilometers with 2730m of positive difference of heigths is equivalent to a real distance of 42km+27km, so 69km.
We recommend you to take into account this alert about the difference of heights before subscribing to one of our races.
| Race | Distance | Diff of heights +/- | Distance Feels (100mD+=1km) | Max time | Number of Time restrictions | ITRA points recommended | Number of participants | % of Finishers | Technical features |
|---|---|---|---|---|---|---|---|---|---|
 | 91km | 6220m+/- | 152km | 24 hours | 10 | 450 | 1000 runners | 55% | Technical race with aerial trail in altitude, possibility of snow on the course |
 | 42km | 2730m+ /1700m- | 69km | 9 hours 30 | 5 | 350 | 2300 runners | 87% | Rolling first part, and some trails are very technical with an important difference of heights |
 | 23km | 1680m+ / 870m- | 39km | 6 hours | 4 | 270 | 2000 runners | 94% | Short race on mountain trails open to intermediate trailers |
 | 20km | 1250m +/- | 32km | 6 hours | 3 | 240 | 500 teams | 97% | Night race by team mountaineering and steep parts |
 | 3,8km | 1000m + | 13,8km | No maximum time | 0 | / | 700 runners | 100% | Aerial race , handrail, stairs etc. not recommended to people afraid of heights. |
 | 10km | 325m +/- | 13km | No maximum time | 0 | 160 | 2000 runners | 99% | Race open to everybody |
 | 15km | 1200m D+ | 27km | No maximum time | 0 | 0 | 150 runners | 98% | Race reserved to 'Espoir' and 'Junior' category |
Charity
Bibs
Since 2016, Chamonix Sport Club offers some charity bibs in order to fund sports projects.
In 2019, thanks to the 30 000€ gathered , 130 children of 7 sport sections have been able to realize their dreams.
For the runners it is the possibilitiy to ensure a bib for one of the Mont Blanc Marathon races and to make a donation to help kids in their sportive project.
Elites
Some bibs are allowed to elite athletes who make the demand.
Subscriptions for athletes are not automatic, each elite have to finalise their proper subscription and all the subscritpion demands have to be sent before 31st of March 2021 to club@chamonixsport.com
Having an Elite Bib means to be present at the prize giving ceremony and at every other invitations that you could receive from the organisers (press conference etc.)
Rules for attribution
42
km
| Men | Women | |
| Bibs guaranteed and free | >850 | >650 |
| Bibs guaranteed but paying | >825 | >625 |
Other
Races
| Men | Women | |
| Bibs guaranteed and free | >825 | >650 |
| Bibs guaranteed but paying | >775 | >600 |
Prize money will be awarded to the first three men and women of the Mont Blanc 42km and Mont Blanc 90km.
Prize money will be awarded to the recordmen and recordwomen of the Vertical kilometer.
The amounts will be communicated soon.
Tour
Operator
At the occasion of your travel to Chamonix, you can plan your journey with one of our Tour Operator partners.
Sport Tour International proposes to you some packages of travel and assistance for this wonderful event. A guaranteed bib and accommodation in the center of Chamonix are available, transfers to Geneva airport and the help of our experimented race-guides.
Our goal ? Find the absolute best trail running experiences in the Alps.
Away from the crowds, in high Alp villages, we’ll seek out those runs that are a bit quieter, a bit wilder, and bring together the very best the Alps have to offer.