In the sector Princes de ce Monde, on a boulder on the crest with an old red arrow. Sitstart at the angle on a small boulder, traverse on two faces and exit before the second boulder.
From the parking lot of Le Carrefour du Rocher des Princes, follow La Route de Montmorin (blue path) for 100m, take a small path to the right before the bend and follow that one up to the crest.