In this area, only a few boulders have been opened, including a quick-drying traverse. From Arbonne, take the D64 in direction of Achères-la-Forêt and park the car at the top of the slope, after the bends, just before the tunnel under the motorway. Follow La Route de Melun au Vaudoué to the West, pass under the motorway and go down the slope towards a sandy plain. The traverse of Les Lèvres de Feu is near the top of the slope, 150m on the right from the middle of the descent, and the other boulders can be found further by following the path.