You can start from the cross at Les Bastides, but there is little parking: two or three spaces at most. You can park a little further down, on the road to Bevons.
(S/E) With your back to the Bastides buildings, take the forest track which slopes downwards further on to the left and leads to the junction with a marked path.
(1) Turn right, following the markings, towards the Pas de l’Essaillon and head towards it.
(2) Turn left onto the path, changing sides of the slope. After a few metres, leave the descending path to walk along the cliff face. The route along the rock face is very steep but well-marked. A few well-placed cairns help with navigation. Reach the junction with an ascending path, marked in yellow.
(3) Turn left to continue the climb, which remains very steep, towards the summit of the Pierre Impie.
(4) You can make a round trip to the summit of the Pierre Impie: look for yellow markings on the rock. Otherwise, continue along the marked path towards the Roc de l'Aigle. Further on, the path begins a descent towards a small pass at the foot of the Roc de l'Aigle and reaches a junction.
(5) Leave thePR®® which climbs to the right and head left, up the slope. This very steep path is marked in yellow and joins a track suitable for vehicles. Follow this track to the left for 150 to 200 m, and at the bend, take the yellow-marked path on the left. This crosses some streams, then descends along a small ridge to reach the Chapel of Saint-Bevon, a ruined chapel in the middle of a forest consisting mainly of pine trees.
Continue along the path to the junction: PR®® signpost.
(6) Take the marked path on the left, heading north. Reach a junction, located about fifty metres from the Pas de l'Essaillon (2), and turn right to follow the path back up the hill, in the opposite direction, to the starting point (S/E).