The start is in Bourgmenu, near a transformer. The hamlet of Bourgmenu is located just over 1km from Saint-Andéol.
(S/E) Climb the tarmac road towards the cliffs (west) for about 50 metres. At the first bend, take the path on the left. Pass above a building and climb westwards through fields and forests. At a fork, turn left (south-west).
(1) Cross a forest track at an altitude of 1,190 metres. The path continues to climb, curving to the left. Leave a path on the left and cross another forest track (1,290 metres). Continue climbing.
(2) At an altitude of 1390m, look for the path that branches off to the left (do not take the logging track in front of you). This pleasant path leads you to the Abri de la Peyrouse via a good twenty hairpin bends.
(3) Turn right onto the Périmètre trail, following the contour line. Walk along the magnificent limestone cliffs of the eastern balcony of the Vercors.
(4) At point 1599, take the path on the left, which will lead you under the Pas Morta (ignore the path that climbs up to the left). Continue to point 1547, leaving two paths on the right.
(5) Turn right: from here, the descent is much easier than at the previous junction. The path is well marked, crosses a section of forest, and is circular, returning to a forest track (1238m).
(6) Turn right (south) and descend. At the first hairpin bend, go straight ahead. Follow the track for about 1 km and rejoin the uphill path at the junction you passed on the way up.
(1) Turn left and take the same path back to the car park (S/E).