100km and 4070m positive altitude change **
From Les Rousses (department 39) on Saturday, 30th September to Métabief (department 25).
Limited to 800 runners.
Registration fee : 115€ / runner
The registration fee include : the entry to the run, the timing, safety all along the race, the food ans water supplies, the access to the showers or any other facilities rolled out by the organizer.