In Bordeaux, take the A62, direction Toulouse.
After Langon, take the A65, direction Pau - exit at "rest area Bazas", take the D3, then the N524, direction Mont-de-Marsan, for 4 km, turn left CUDOS, D932E6.
In the village, first road left, then right, D932E7, direction Lavazan.
After the bar, at the exit of the village, turn left "Route du Bilh".
At 2.1 km, turn right at the sign "La Pierre", "Chemin privé".