Challenge yourself on this vertical route starting from Attignat-Oncin. A difficult climb, with steep slopes in places, in the footsteps of the Mont Grêle trail, an event that uses this climb.

A climb of more than 700m+ on which you will be able to time yourself thanks to the Aiguebelette outdoor mobile app and the DéfiTrail markers positioned on the route. You will be able to compare yourself with the best times and move up in the ranking.