This route is the ultimate adventure. It will take you along 2 of the biggest routes in the Dent de Crolles network: the Galerie du Solitaire and the Boulevard des Tritons.
Just think: these 2 galleries are each around 900 metres long!
This underground loop, which begins and ends at the Guiers Mort, is a delight for those who want to immerse themselves for a day in an atypical universe that is unimaginable from the outside.
A memorable underground expedition for lovers of sporting challenges and wide open spaces!