Start from the car park, Chemin du Puits d’Enfer.
(S/E) Near the car park exit, follow the path which starts next to the information board, heading south-east, and head down towards the river.
(1) Follow the path on your left that runs alongside the river until you reach a bridge.
(2) Cross the river via the bridge, then head straight up the slope at right angles to the river. At the top of the slope, follow the path on your right, then after 300 m, turn right towards the river. Follow the river until you reach the footbridge. Take the footbridge to reach the junction you passed on the way out.
(1) Carry on straight ahead, cross the river again and reach the other fork you passed on the way there.
(2) This time, carry on straight ahead.
(3) Turn left as you head up the hillside, then continue along the path, which curves slightly to the right. At the top of the hillside, turn left. Further on, cross the Ruisseau de la Martinière on the left and return to the car park (S/E).