On the South face of the hill in between Le Chemin de la Charme and Le Chemin de la Vallée d'Arbonne. Standing start right, traverse to the left under the roof at the beginning and exit at the end.
From the parking lot, the most comfortable access consists in taking Le Chemin de la Vallée d'Arbonne up to a chaos on the right. It is also possible to follow Le Chemin de la Charme and to go up the slope on the hill.