About 150m to the Northwest of yellow n°45 and Percolation Critique. Sitstart to the left, stay under the prow and exit to the right of the prow.: From the parking lot of Carrefour du Mont Ussy (Rocher d'Hercule), take the Route du Mont Ussy for 200m in direction of the main sector, and turn right at a path and follow this for 100m. The boulder is on the left, among a small chaos. See also the video 'Finding the Fouine boulder'.