Park on the hard shoulder by the D378.
(S/E) Take the track heading north, which descends and enters the woods. After three bends, it heads due east and reaches a crossroads.
(1) Let the track descend to the left and carry straight on along a wide path. After a few metres, continue straight on, ignoring a path branching off to the right, and begin a descent leading to a three-way junction.
(2) Take the middle path, which follows the contour line roughly, then, after about a hundred metres, take a grassy path slightly to the right, leaving the main path which leads to a pass that you will reach after climbing the “Petite Sara”. The path passes beneath the cliff and offers the first views of the Gerbier de Jonc. Cross a scree slope and, about 100 metres further on, look out for green and white markings painted on the trees in the beech forest on the left, which mark the boundary of the forest plot.
(3) From there, head up to the left, straight through the forest, following the green and white markings to exit the forest and reach the ridge. Once on the ridge, head up to the left (north-west), following the white markings on the rocks more or less closely. From there, reach the summit (elevation 1424 on the IGN map). Continue along the ridge, carefully following the white markings, which leave the ridge to the right at one point (marked by a cairn). Descend straight down the slope, re-enter the forest and reach a pass.
(4) At the pass, head down to the right (north) and, after a few metres, ignore a path that follows the valley line; instead, take another path on the left which begins the descent, leaves the forest and joins a track at another pass.
(5) Head down to the right along this track, which is joined on the right by another track. Continue for a few more metres past this junction.
(6) Take a path on the left which climbs over scree (marked by a cairn), cutting across the original track. This path climbs through the woods to two cairns which indicate that you should leave it.
(7) Turn right onto a well-marked path and climb gradually through a landscape alternating between scree slopes and trees or shrubs. This will take you to the ridge. Climb to the left, following the ridge to the summit of the knoll of Sara (the ‘Great Sara’). Continue along the ridge to descend to the 1355-metre contour on the IGN map, where you’ll find a cairn and a well-marked path crossing the scree slope.
(8) Take this path on the left, which crosses the scree slope and a small copse before reaching the meadows. From there, return to the pass you encountered earlier.
(5) Follow the track to the right, which climbs gently at first and then more steeply. The track joins a wider one at a hairpin bend.
(9) Take the branch on the left which climbs, makes two hairpin bends and joins the original junction at the start of the walk.
(1) Continue climbing to the right to reach the car park (S/E).
