This is a 70km trail running race with 5,400m elevation gain taking competitors up onto the Grande Motte glacier in Tignes.
There are actually a number of different lengths of races with the largest and hardest at 70km, then one of 42km (+3500m), 20km (+1000m), 9km (+300m), and a vertical kilometre.
Finishing the longest race will give you points towards the UTMB. The race is part of the European Skyrunning Championships. Find out more by visiting the website.