Parking: on the D378, from Mont Gerbier de Jonc, head towards Mont Mézenc. After about 2.5 km, park in the car park (S/E) on the right, at the Montouse hiking signpost (on the other side of the road) located at an altitude of 1398 metres on the IGN map.
There are no signposts for this route
(S/E) Take the track on the right which descends to a crossroads. The main track descends to the left, marked with a white and yellow sign. Opposite is a grassy path. On the right is a track with a large wheel-shaped rock on the edge.
(1) Descend the left-hand track, which winds down twice, to reach another crossroads. The main track descends to the left, making a hairpin bend. Opposite, a narrower track continues straight ahead.
(2) Continue straight ahead on this track. You will arrive at some pastures: there are two wire gates that you will need to open and close. The track makes two turns. Continue until you reach an elevation of 1285 metres.
(3) Continue along the track until you reach a new crossroads where three tracks meet. On the left, a steep, very rocky path climbs up towards the undergrowth. Opposite, a path continues along the current track. On the right, a beautiful track descends into the valley.
(4) Take the rocky path on the left. Climb for about a hundred metres. A cairn has been built on the embankment on the left. Just opposite, a small, very discreet path appears in the trees. Take this path (not shown on the 1:25,000 map), which will become more visible. It climbs diagonally up the south face of the Suc de Sara, crossing several scree slopes and groves. The view is magnificent. You will arrive at the east ridge. Continue to a cairn.
(5) Turn left onto a steep path and climb westwards to the top of the knoll.
(6) Continue west and descend via a steep track.
(7) Continue straight ahead (ignore the steep path that branches off to the left among the rocks).
(8) Turn left. The well-marked trail through the scree then winds through the undergrowth and crosses pastures to rejoin the beautiful track used on the way up, almost at the level of the first wire fence.
(3) Turn right. Return to the car park via the same tracks as on the way there.