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On the D908, take the D46a at the Auberge de Pichauris. Drive past the park car park and park further on at the large Micocouliers car park, indicated by a sign.
(S/E) Pass through a gate and head south along theGRP®2013trail, marked in yellow and red, which runs alongside a picnic area. After a left-hand bend, you’ll reach a Y-junction.
(1) Turn left and follow the path which climbs up to a barrier and an abandoned house. Turn right onto theGRP®. Pass a riding centre and reach a tarmac road at an elevation of 425 metres. Turn right onto this road and reach a footpath just before the bend in the road.
(2) Leave the road and follow theGRP® path opposite. At the top, you’ll reach an X-junction. Continue straight on, following the yellow markings. Join the tarmac road and follow it to the right for about 50 m.
(3) Leave the road again and take theGRP® path, which turns immediately left, heading east. The stony path climbs steadily. You will reach a T-junction.
(4) Leave theGRP® which heads off to the left and continue straight on. Join the track leading to Mont du Marseillais. Cross it and take the path opposite, which rejoins this track further up. Turn right and, at the next junction, continue straight ahead to reach the Mont du Marseillais facilities. Admire the 360° view. To the north, follow the yellow and red markings of theGRP®2013.
(5) Take this path and walk for about 80 m. You will reach a cairn and a Y-junction. Turn right onto the unmarked path which passes beneath the cliffs of Mont du Marseillais and joins, further on, the Sentier des Tourdes, marked in yellow. You will reach a Y-junction.
(6) Keep to the left for a stony descent. Watch out for slippery patches. You will reach a Y-junction.
(7) Turn sharp right towards Le Pas du Grand Vallon, signposted on a rock and marked in light blue. Here too, the descent is stony and slippery. Take care. You’ll reach the start of the Grand Vallon and a T-junction.
(8) Leave the light blue markings and turn right into the valley. The start of the path is overgrown and features large flat slabs. It then becomes more rugged with numerous rocks to climb over, using your hands for support. You’ll reach the foot of the large potholes.
(9) On the left, use the cable to cross a very steep slope. Further on, do the same on the right-hand side. Finally, the most difficult section: using your arm strength to cross two large potholes fitted with chains. The rest of the route is rugged, with more large rocks to climb over. You’ll reach the end of the valley and a Y-junction.
(10) Keep to the left. The path climbs. On the left is the Baume Plate cave, marked on a rock. You’ll reach a T-junction.
(11) Turn sharply right towards the Col du Régage, indicated by a sign. This path, running along a ledge, is very pleasant. You’ll reach the pass and a junction with a track.
(12) Take theGRP®2013path opposite, also marked in light blue, and follow it. Admire the scenery. Below, note the hamlet of Pichauris. You’ll reach an X-junction.
(13) Turn right towards the orientation table indicated by a sign. Then head north-east to arrive to the left of the large meadow in the hamlet of Pichauris. Explore the area. Follow the main track heading east. You’ll reach a Y-junction and an old gypsum quarry.
(14) Turn left onto the Chemin des Bergers, then return to the original junction from the outward journey.
(1) Turn left and return to the Parking des Micocouliers (S/E).
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