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Coming from the south, Col de la Croix Haute, take: Lalley, towards Tréminis, Château Bas, Château Méa and before the bridge, turn right towards Le Serre.
Park in the car park at the entrance to the village of Le Serre.
(S/E) The start is behind the church, following the road eastwards to the first crossroads.
(1) At the first crossroads, turn right. The road becomes a track and heads south-east, approaching the torrent.
(2) Cross the Rapidet stream and here the slope becomes steep, but fortunately the path is well marked. You are now on the ridge and in the Charbonneyre forest.
(3) As you leave the forest, on the right, there is a passage where you need to use your hands, but it is not dangerous, just requires a little care.
The Petit and Grand Ferrand faces, with the Col du Drouillet, open up before us. Behind us is the Trieve and, in the distance, the Vercors mountain range. All our efforts are forgotten when faced with such a view.
(4) You arrive at a grassy area where the path branches off to the left before returning to the Ferrand quarry. Continue to point 1685, marked by a large rock.
(5) Continue through the clearing to the cave. Cover up, as it is cool inside.
(6) Retrace your steps to the fork at the large rock (point 1685).
(5) Cross (south-west) the dry stream, look for the barely visible path, and climb up the clearly visible path opposite on the Talweg. You are now approaching the only tricky part of the hike.
(7) Continue along the path overgrown with grass, below Les Tonneaux, until you reach the forest track (1582 m). You will arrive at Combe de Maroure.
(8) Follow this track, which winds down in large loops to the hamlet of La Chenal.
(9) Turn right and head for the car park (S/E).
Visorando member
Moderate 
Easy 
Extremely difficult 
