The walk starts from the car park of the church of Saint-Clair de Margue.
(S/E) With your back to the church entrance, go down the street on the left and follow the road straight ahead. Continue for 200 metres until you reach a path that descends to the right.
(1) Follow the path which leads to a road. Follow the road to the right. Ignore a road on the left and you will arrive at a crossroads (marked by a cross).
(2) Take the road opposite for about 250 metres and turn right onto the path. Follow this path until you reach a road.
(3) Take the road on the left. Follow this road for about 1.2 km. Look carefully at the piles of stones on the right-hand side of the road. When you see stones forming two niches (see photo), continue for 50 m along the road until you reach a path on the left.
(4) Take the path onto the limestone plateau. When the path narrows, look out for a path leading down to the right. This path leads to the entrance to the Gouffre de l'Oule.
(5) Follow the path, which continues along a road leading to Mas de Vivigné.
(6) At the crossroads, turn left onto the road and, at the next junction, take the road on the left that leads to Mas de Treille.
(7) In the hamlet, take the path on the right which leads to a wider path.
(8) Go down this stony path and continue until you reach an intersection with another path.
(9) Turn left and go up the path to the crossroads with a cross.
(2) Turn right and, following the same route as on the way there, return to the church car park (S/E).