At the end of the sector, up the slope past Attrapeur de Rêves. Start completely right, pass the first angle, traverse the second face with good holds, pass the second angle and exit at the end in the small slab.
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.