Park at the side of the CD 520b immediately after crossing the Pont St Bruno when coming from Saint-Laurent-du-Pont.
(S/E) A few dozen metres further up the hill, take the forest track that climbs from the road up the slope and cross the timber storage area. Continue straight ahead along the skid track up a steep slope.
(1) When it changes direction to turn right, take the Sentier du Solitaire, which climbs through the forest between the track and the cliffs overlooking the Guiers Mort.
The start of the path is tricky to find: avoid taking a vague track right at the edge of the cliff, which is very exposed, but take the more clearly marked path about ten metres higher up: it starts just after the bend in the track, via a small hairpin bend to the left, marked by a discreet cairn.
This path climbs steadily and joins the forest track: do not look for its trail on the opposite side, which appears to have disappeared, but follow the track uphill for about a hundred metres. When it turns right, continue straight on through the forest along the Sentier du Solitaire, which you will find again (small cairn near the start).
It continues to climb more or less close to the cliff and, at around 1070m, reaches a ridge where the path coming from the Cheminée de Fétrus joins it on the opposite side. Turn right to climb the few metres up the ridge to reach the 1097m point, on the forest track which passes over a pass here.
(2) From this pass, the start of the access path leading up to the Cheminée seems to have disappeared: head up the wooded ridge opposite (south-east) to ensure you find this path. It winds its way slightly upwards through the forest before crossing the slopes to the right to reach the foot of the Cheminée de Corde (also known as the Cheminée du Solitaire), a wide, steep, grassy and earthy couloir winding its way between two rocky ridges to the left.
NB: the Cheminée is significantly further south than indicated on the IGN map, which misleads many people!
From the foot of the couloir, climb up it heading north-east, generally straight up the slope, sometimes on the left-hand side at the bottom, then on the right-hand side further up. Old cables along the side rocks help you climb the slope, but they are in very poor condition and missing in several places. This climb can be very slippery when the ground is wet (in any case, the chimney, flanked by cliffs, gets little sun).
The exit onto the ledge is obvious, in a more wooded section: it opens out onto the beautiful Corde meadow (which narrows as the forest encroaches), where you usually see the sun again after it was hidden during the ascent (you can climb up to the left to the Rocher du Solitaire for a more unobstructed view).
Head out across the meadow and climb up the paths towards the ridge overlooking it: you’ll reach a curious structure – the Chapelle de Corde, built from rough-hewn logs. Then veer to the right, staying close to the ridge, until you cross the path coming from Habert further down, which crosses the ridge at a threshold.
(3) From this threshold, the path descends to the left, keeping to the side of the slope and running along the foot of the Rochers de Montheur. Once at the bottom of the valley, follow the signposted path towards Arpison carefully: climb up a rocky area on the right, then ascend more directly up the north-north-westerly slope and, via a series of switchbacks, emerge onto the Arpison meadow.
(4) Take the path on the left which climbs towards the rocks to reach the Belvédère d’Arpison.
(5) Retrace your steps back to the meadow.
(4) Continue north-east and cross the meadow at the far end, passing close to a chasm and then near the Habert d’Arpison.
(6) At the end of the crossing, do not head back up towards the Col d’Arpison path (coming from La Ruchère), but turn left to follow the valley floor, which is initially flat and then slopes gently downwards. Always keep left at junctions: the path winds its way downwards beneath the foothills of the Rochers d’Arpison and joins the track coming from Le Pertuis; follow this to the left, climbing slightly, until you reach the Col de Fétrus, which is more grassy than wooded.
(7) At Fétrus, turn right to follow the broad, almost horizontal ridge. Before reaching the Rochers de Fétrus, the signposted path veers sharply left, descending via well-marked switchbacks down the slope through the forest. Further down, it crosses a torrent (usually dry) and continues to wind its way down to a junction.
(8) There, at around 1090m, let the signposted path branch off to the right – heading down towards the Cheminée de Fétrus – and take the forest track opposite instead. Follow the often-dilapidated track, first slightly downhill, then uphill to reach the 1097m pass which you crossed on the way up. This section of the route is easy, except for a stream crossing where the path has been washed away; you’ll rejoin it on the other side.
(2) At the junction of the forest track and the Sentier du Solitaire, there are two options:
- either head back down via the path taken on the ascent,
- or, more comfortably – although the track has been damaged by storms – follow the forest track down a gentle slope (this is the route shown on the map). After a few wide hairpin bends, you’ll reach the original junction.
(1) Continue along the track and then take the road on the right to return to the starting point (S/E).

