15m above Chauffard du 6b, up the slope past Attrapeur de Rêves. Sitstart without crash-pad in the pit with a good hold left hand and a pinch right hand, climb the overhang and exit at the top.
From the parking lot, follow Le Chemin de la Gorge aux Châts up to Obstination, take the small path leading to Attrapeur de Rêves and, 30m further, a small path that goes up the slope among small rocks. The boulder is just above.