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.
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.
At the occasion of your travel to Chamonix, you can plan your journey with one of our Tour Operator partners.