Central problem on a boulder along La Route des Barnolets, near the bivouac of Bourron-Marlotte. Sitstart, climb the overhang, mantle up above and exit at the top. NB: un a sitstart right as for The Long Whey is also possible (same difficulty).
From the bivouac of Bourron-Marlotte, follow La Route de la Grande Vallée for 200m eand take La Route des Barnolets on the right. The boulder is 250m further, on the right of the path.