Les Gros Bras

Les Gros Bras is a moderate bouldering route located in the Nainville area, known for its challenging yet achievable climb. Graded as "FB4," this route features a combination of belly holds and small crimpy features that test both strength and technique. Positioned as the 16th route on the Blue circuit, Les Gros Bras is one of the six routes scattered across the boulder named Biodégradeable, offering climbers a diverse and engaging experience in the beautiful surroundings of Nainville.