On a boulder marked with an X in blue, above Léon and to the right of L'Effet Pimousse, just below the viewpoint. Sitstart on the left, to the left of the stone, traverse to the right and exit on the right with the arete as for Direct X.
From Recloses, take Le Chemin de la Butte Blanche up to the small path of l'Escalier to the left (blue circles) that goes up to the plateau; the boulder is near the top, on the right.