La Diagonale du Filou

"La Diagonale du Filou is a challenging bouldering route located in the Ussy area, graded as "FB6b". This route features a traversing ascent up a wall, offering a test of both strength and technique. Ranked as the 32nd route on the Red circuit, it is part of a series of 12 routes on the boulder named Effraction. The topo image provides a visual guide to the general climbing direction, adding to the allure and excitement of this demanding climb."