Avoid leaving the paths and keep your dog on a leash from April to July.
On the boulder 5m to the left of Tenochtitlan, 40m after Le Smile, in the sector Arcades. Sitstart on the right, traverse to the left and exit at the end of the boulder.
From the parking lot of La ferme du Montrouget, pass the main sector, take Le Chemin de la Roche qui Tourne (GR) for 40m to the East and follow a small path up the slope to the South for 150m. The boulder is at the end of the valley, 40m to the North after Le Smile.