Park in the car park at Souspierre town hall.
(S/E) From the car park, return to the RD179, marked in red and yellowGRP® du Pays de Dieulefit, and take it on the left to the next crossroads. Turn right onto the small road leading to the Bayanne farm.
(1) Go up to the left, following a well-marked track, ignoring the various paths that cross it.
This track continues between two rocky outcrops, under a ruined tower (top right). Continue along this marked route. The track descends slightly, then forms a wide hairpin bend above a stream, before climbing gently up to the Combe des Oursières mast.
(2) Turn left heading north. Continue climbing through the woods for about 2 km, ignoring the various paths that cross the main track. You will come to a fork.
(3) At this point, the marked trail forms a 90° angle to the right. Leave it and continue straight ahead, heading northeast, ignoring the various cross-markings on a tree, along a path climbing towards the ridges. It quickly turns into a well-marked trail, running along the ridge to its end.
(4) At the end of the ridge, the path descends slightly through boxwood at first, then quickly becomes a very steep trail leading to the Petit Pas. Be careful, this very steep and exposed descent passes through a rocky outcrop: exercise extreme caution. Reach the Petit Pas.
(5) On the way back, climb up opposite, heading east, towards the summit of Châtelard. A few cairns mark the way. You will reach a small path and the Grotte de l'Ermite. To the right of the cave, a small steep path leads, after a few rocky passages where you will need to use your hands, to the summit of Châtelard.
(6) Turn back to the Petit Pas.
(5). Descend to the left along a path to the marked GPR Tour du Pays de Dieulefit trail. Follow it to the right, ignoring the various paths on the right that join it.
(7) Reach the next crossroads. Leave the marked trail for an unmarked path opposite, heading south. Stay on this main path for about 800 m until you reach the intersection with the first hairpin bend on the right (cairn).
(8) Take this path, which climbs slightly at the start and then levels out. Stay on it, ignoring the small paths that join it. There are a few ribbons in the trees. Cross a very small stream, which is often dry. Do not go down into the ravine on the left, but continue straight ahead until you reach the next junction with a track.
(9) Follow it up to the right for about 250 m. You will reach a crossroads with four paths (here, there is a slight discrepancy between the IGN map and the actual terrain). Take the path on the left, heading south, which descends into the bed of the Bridon stream in Combe Jallet.
(10) After about 250 m, the path splits in two. Follow the left path, the left bank of the stream, and join the RD540*.
(11) Follow it to the right until you reach the bridge, then cross it. Take the small road to the next junction. Take the track on the right. After a bend, you will reach a stream.
(12) Just before the stream, take the path on the right alongside a horse park (wire fence). The path runs alongside the stream, then climbs north-west towards the Faucon ridge. Stay on the path, which is not very visible, climbing towards the ridge (green markings in the opposite direction). The path then turns west and joins a yellow-marked track.
(13) Take this marked track on the right and stay on it until you reach the road.
(14) Continue straight ahead, cross the Jabron, then the RD540 (take care). Take the small road opposite leading up to Souspierre and continue to the car park (S/E).

A nice hike that I've wanted to do for quite some time! 