In the West part of the sector, in the South ridge, just under the path leading to Trypophobie. Sitstart completely left without crash-pad with the arete left hand, traverse to the right and exit behind the right arete (or just before, with the arete right hand).
Park the car at the edge of the forest at the end of the Montigny-sur-Loing cemetery (Vallée aux Châtons). Follow La Route du Croc Marin towards the North until its intersection with the Route de la Grande Vallée (400m) and take a small paths that goes up the slope to the right. The boulder is located before the top of the ridge, in a small chaos.
