Avoid leaving the paths and keep your dog on a leash from April to July.
On the North face of the boulder of Le Coquillage (6-7m high characteristic boulder), to the right of the downclimbing route. Standing start at the small pillar at a vertical broken hold and exit above.
From the parking lot, follow Le Chemin de la Plaine de Chanfroy, which becomes Le Chemin de Milly, for 1km600 and turn left at the GR; the boulder in in the chaos to the right of the path.