Park at the Passe Communale car park.
(S/E) Follow the Red Disc markings towards the main road to cross it. Once at the edge of the woods, turn left towards the shooting range junction and L’Olympe. Once at L’Olympe, begin the 30-metre descent to reach a fork.
(1) Look out for the start of a path on the right and follow it to Rue du Champ de Tir.
(2) Leave the street on your left and take the path on the right, leaving the Red Disc markings to follow the Yellow Cross markings.
(3) At the junction, turn left to head back towards Saint-Laurent. Pass the start of the path leading to the Tête de Benavau viewpoint.
(4) Look out for the start of a path leading downhill between the houses on the left. Take this path, then continue along the road (Chemin du Réservoir then Rue de la Red Cross).
(5) Take the steps on the left behind the recycling bins and continue along the road (Impasse du Martinet).
(6) Under the railway bridge, make a 180° right turn onto Rue de Bertraménil. Pass two streets on your left.
(7) At this junction, there is an information sign about the route markings in the area, as well as parking spaces for walkers.
Leave the Yellow Cross markings and follow the Green Disc markings to the left. Walk alongside the car park and climb up until you reach the water supply canal for Lac de Bouzey. Before the bridge, turn right to walk alongside the canal to the next bridge. Cross it and follow the road on the left up towards the forest, then continue straight ahead.
When you reach the ridge of the Coteaux de Saint-Laurent, look out for the start of a path on the left.
(8) On the descent, cross the track twice, and look out for the start of a path on the right, then join the road.
(9) Cross the road and walk along the fields until you reach the descent into the forest at Étang du Bult.
(10) Walk along the right-hand side of Étang du Bult, then head back into the forest.
(11) Once you have finished walking along a field on the left, take the path opposite to descend to Étang du Riefaing and walk along its left side.
(12) Continue along the pond, turning right, then leave the forest to reach the Ferme du Humbertois. Turn right onto the road and walk alongside the farm for about 200 m.
(13) Take the forest path branching off to the left. After about 200 m, leave the Green Disc markings and follow the Green Cross markings to the main road.
(14) Leave the Green Cross markings and follow the Red Disc markings. Cross the road and continue along the path into the forest.
(15) Leave the Red Disc markings and follow the Red Cross markings, continuing downwards alongside the small stream. Once on the forest track, turn right towards the Roches d’Olima.
(16) Cross the small bridge on the right, following the Red Disc markings, and walk alongside the supply canal until it goes underground.
(17) Continue up the valley along the canal.
(18) Walk past Notre-Dame des Trois Vallées and continue up to the car park (S/E).