At the end of the sector, up the slope past Attrapeur de Rêves. Start completely left on the slab, pass the first angle with low holds, traverse the second face and exit just before the second angle.
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.