Access: from Vallouise, take the D994 up to Sarret (in the municipality of Pelvoux), turn right towards Eychauda, then at the second hairpin bend, park in the car park on the right.
(S/E) From the hairpin bend, go up the lane that follows the Torrent de la Julianne, then turn right at the fork and cross the stream. The path runs alongside the stream, following a scree slope, then crosses it again. It then winds its way up a slightly steeper slope to reach the Coul d'Aval.
(1) After passing the mountain chalet, leave the path on your left that leads to Clot Soubeyran and continue in the same direction. At the next fork, take the path on the left marked with yellow dots (the path down to the right will be used for the return journey). This path climbs towards the Ravin des Traverses and then joins the second mountain chalet, the Coul d'Amont, via a final crossing.
(2) Continue east on a path (not shown on the IGN map) that leads to a T-junction marked by a cairn, the highest point of the route (1,813 m).
(3) Turn 90° to the right (south). The trail passes under the cliffs of Montbrison, where the Cascade de la Pissette waterfall flows.
(4) After a gentle slope, the path descends in switchbacks and crosses a larch forest. On this descent, turn right twice at intersections. You will reach the Coul d'Aval again.
(1) Head west and follow the outward route to return to the car park (S/E).