To the west of the main sector, near Route de Sully. Sitstart on the right, traverse to the left and exit after the inclined stone (without touching it, limited space) with the arête.
From Route de Sully , take the blue path n°6 in the direction of La Ligne Noire (East). Walk 10m then follow the blue path n°6 towards the North (which goes down while remaining parallel to Route de Sully). Walk about 20m, the boulder is 10m on the right.