Take the D22 towards Châtel in the Abondance valley. Coming from Thonon, just as you enter the village, the parking lot is on the left, as is the via sign (do not park on the right-hand side of the road: private property). From the sign (don't take the road leading to the quarry at the bottom of the parking lot) return and walk along the road for 100 m to find the path that leads through the woods for 15 minutes, crosses 2 waterfalls and arrives at the foot of the wall.