Grosse Bosse

Grosse Bosse is a challenging bouldering route located in the Ussy area, graded with a difficulty level of "FB6b." This route features crimps and a mantleshelf, providing climbers with a varied and technical climbing experience. It is the 16th route of the Red circuit and one of six routes on the Bosse boulder. Climbers can also attempt a variation of the route known as Grosse Bosse (assis). The topo image offers a visual guide to the general climbing direction, making it easier for climbers to plan their ascent.