7 Opening About Route Activities Access Suggestions Aven Grotte Forestière. “Visitez Autrement” Back to the list Circuit VTT : A la découverte du plateau des Gras A tour of 4 days and 3 nights leaving from Largentière. Sort BOUCLE Opening From 01/04 to 30/10 : open daily. Route Activities Pedestrian sports Hiking itinerary Access Environment Mountain location