Sitstart (attention: the difficulty of the start depends on the thickness of the crash-pad!) and climb the arete.
NB: the boulder is outside the RBI.
Access
Park along the N152 almost as for Rocher du Mauvais Passage but on the other side of the road, follow Route du Rocher de la Combe to the west, take the first valley on the right and go up the hill on the left.