This sector gathers all the boulders on the Western hill of the Cuvier-Châtillon area. Roughly, old problems can be found along the blue circuit TD- "Philou" and recent openings in the South face. From the parking lot of Bas-Cuvier, the easiest access consists in following a small path parallel to the N7 and to continue diagonally to the right after Effet de Serre. The first two boulder are 100m further, where the principal sector can be seen up the slope, above and to the left of a big oak. It is also possible to come from Bas-Cuvier via Imothep but this access is rather complicated with crash-pads.