Park at Chapelle des Marches. Walk along the river 1.3 km on the gravel road. It will fork (right way leads to a wooden bridge) but you should take the left paved way. After 100 m in the left curve head left and walk on the pasture at the edge of the forest for 10 min. When you walk under the high-voltage electricity line, after 30 m head into the wood (it's difficult to find the entry). After 3 minutes you reach the crag.
30.Aug.25: be careful, from the main wall on the path to the first 9 routes there was a big wasp nest on the way and we got attacked.
Bringing a helmet is wise, rock fall from the top occurs all the time.