On the boulder of Bancroche, on the East face of the Groison hill. Sitstart completely right without crash-pad, traverse to the left on the low legde and exit above a characteristic pinch.
Park the car along La Route du Groison, near the crossing with Le Chemin du Gué de la Grue. Take a path that goes up the slope of Le Groison and follow that one for 200m. The boulder is 5m on its right, just under the top of the hill.