One of the first summer running events in Chamonix it’s also one of the biggest.
A series of world class trail running events from 10km to 80km distances and the famous vertical kilometre event, attracting nearly 10,000 athletes from around the world.
**News** The course of the Mont Blanc 80k race in 2018 will be the same than 2017. But, after different controls the course length is 91km and 6220m of positive and negative height gain. The Mont blanc Marathon organisation has decided to reappoint the race “Mont Blanc 90k”, maximum time for the race stay the same in 24 hours.
