On the boulder of Bicarburation, at the end of a quarry, under the plateau, to the left of de La Route des Gorges de Franchard, in direction of La Gorge du Houx. Start at the left pillar of the bivouac entrance, as for Le Bi se Marque, dyno to the left in the roof, traverse to the right and finish completly right as for À l'Endroit (retour).