Go to Charpey and park at the entrance to Parc d'Orfeuille. Although it does not yet appear on the satellite view, a parking area has been created and can accommodate around ten cars. To get to the starting point. If you are arriving from Chabeuil via the D 125, turn right before the village (altitude 279) and then left just after the bridge. If you are arriving from Barbières via the D 125, drive through the village and take the first left, then left again after the bridge.
(S/E) Start the hike on the opposite side of the village and follow the stream in the direction of its flow towards the south-west. After about a hundred metres, cross the small tarmac road (Chemin des Robins). About 400 metres further on, turn right onto the road, then immediately left onto the path along the stream, which you follow until you reach the Route de Chabeuil (D125).
(1) Use the footbridge on the right to cross the stream. Then pass under the bridge over the D125 on the left to cross it safely and find yourself on the right bank. Return a little towards the road where there is a green barrier and take the wide path that branches off to the left. Now follow the stream on your left for about 1.3 km until you reach the entrance to the village of Saint-Didier-de-Charpey. Pass the school and cross the D119 to reach the village centre (church on the left).
(2) Continue straight ahead on the main road, which will take you to a bridge with a signpost for hiking trails. After the bridge, turn left onto a tarmac road (Chemin des Blettiers) which leads to the golf course. At the crossroads (elevation 233), turn left onto the dirt track that crosses the Guimand ford (a footbridge has been provided to cross dry-shod in case of flooding) and you will reach the second part of the golf course.
(3) Ignore the sign indicating a right turn and continue straight ahead. At the exit of the golf course, join the D119.
(4) Follow it to the left, then take thesecond road on the right at the cemetery, Chemin du Bois Percé. Follow it to the hamlet of Bois Percé. At the last houses, the road turns into a dirt track. Turn slightly left to reach a small road at a place called Les Blaches, and follow it to the right, passing in front of the lodge, until you reach the D 125.
(5) Cross it carefully and continue straight ahead. After about 250 m, at the EDF pole, turn left into Impasse de Béjalas and continue to a fork.
(6) Turn right, walk first in the open through fields, then enter the undergrowth on a pleasant little path that climbs gently. Pass a crossroads and reach a T-junction.
(7) Turn left onto a well-marked path, still in the woods, until you reach the T-junction.
(8) At the sign, turn right towards Charpey. Ignore the paths on the left, walk along the edge of the woods and join a small road.
(9) Follow it to the left and, when it turns right, continue straight ahead on a forest path to the concrete EDF pole. Follow this path for about 1 km. You are in the woods with the Musan mountain in front of you. After about 300 m, keep to the right to pass in front of some small chalets and arrive on the D 102.
(10) Cross it carefully and continue along a wide path opposite (east). Ignore a path on the right and continue north-east to pass in front of the farm building. You will come out onto the D 119a at the Col de Toutes Aures.
(11) Follow it to the left for about 50 metres. Then take thefirst path on the left (signposted) to the place called Les Beriches.
(12) You will come to a road; follow it to the right. After about 150 metres, just before an electricity pole, take a path on the left that is not marked on the IGN map. Climb to the top of the hill following the fence. Follow the yellow markings and/or the trail carefully, as the path is sometimes overgrown. From Les Bocances, the path descends steeply until it joins a road at a place called Le Galon.
(13) Follow it to the right. Take thefirst path on the left. Continue straight ahead (north-west) and ignore the paths branching off to the sides. You will come out onto Route des Grandes Garennes. Turn right and then left to follow Route de Saint-Vincent (west). Stay on the grass on the left-hand side of the road for the next 150 metres until you reach a cross and the entrance to a path on the left.
(14) Turn left onto a grassy path. Take a footbridge and go up. You will come out onto Rue des Fossés and make a first turn right then left to follow Rue de la Voute. After about 100 metres, take the stairs on the right (Rue de la Barricade) and go down them to reach Grande Rue. Turn right, then after about 150 metres, turn left onto Impasse du Verger. At the end, continue on the left along a path that runs alongside the stream to (S/E).