The GT2V, or Grands Trails des Vallons de la Vilaine, takes place in Bourg-des-Comptes, Ille-et-Vilaine, Brittany. Its primary event is a 75 km trail race with 1,500 m of elevation gain, available for solo runners or pairs. Long-distance participants begin at 06:30.
The event also offers shorter options: La Run Nature, an 11 km trail with 180 m of climbing, and La Rando de la Cordée, an 11 km hike with the same elevation profile. The GT2V combines trail running and hiking, and it benefits La Cordée, adding a local solidarity aspect to the competition.