From Paris, exit at Nemours on the motorway A6 and take the direction Montargis-Sens. At the third roundabout, take the D225 on the left in direction of Sens-Egreville. 4km further is the forest of Nanteau Poligny; continue for 1km up to a bend on the left with an electric line. Turn left on the paved road from Nanteau to Poligny along this line and then left again on the Allée des Enclaves and Le Chemin de la Fosse aux Loups. Park 500m further at the ONF fences. The boulders are 100m underneath.