On an isolated bouder on the northeastern side of the hill called Châteauveau. Sitstart in the back of the roof with a big undercling, climb the roof with its right arete and then both sides of the roof and exit on the prow.
Access: from Le Chemin de la Charme, follow the former trace of the 25 Bosses path in a westerly direction. The boulder is on the left on the slope of the first hill.