The start is at the last bend, just below the Col de Perty on the D65 east of Saint-Auban-sur-l'Ouvèze. You can park in a clearing at the start of the forest track.
(S/E) Head south-east along the forest track.
(1) At the fork, 200 metres further on, leave a yellow-marked path on your left and continue straight ahead. Further on, leave a path on your right and head towards the pylon and telecommunications antennas.
(2) Take a yellow-marked path on the right that descends steeply at times to bypass a first peak (1,440 m). After a flat section, you will come to a crossroads.
(3) Turn left to rejoin the ridge in a few minutes. Then simply follow the ridge, enjoying the superb scenery.
(4) At the "Crête de Chamousse" crossroads (with two "s" on the sign), continue straight ahead to the summit (marker at 1532m), which is a 2-hour climb.
(5) Descend to the "Crête de Chamousse" crossroads that you passed on the way up.
(4) Turn left towards the west, heading for the Laugier hut. There is no clearly marked path here, so you will need to follow a trail marked by faint yellow markers and a few cairns. After about 45 minutes of descent, you will arrive at the Laugier hut.
(6) Head northwest on a trail that quickly becomes a path. At a hairpin bend, continue in the same direction on a yellow-marked trail that rejoins the forest track not far from the start, which you follow to the left
(1) Turn right onto a yellow-marked path to reach the Col de Perty orientation table. This path is very little used and the tracks are lost in the vegetation. Continue more or less northwards, join the ridge path and descend to the left until you reach the table.
Continue downhill to the pass, then take the road on the left for about 250 metres to return to the car park after a 3½-hour walk (S/E).