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Park near the church of Saint-Pierre-la-Roche.
(S/E) From the church, head down the D213 and, at the first hairpin bend, leave the tarmac road to join the path on your left.
(1) Continue along the path on your left, where you’ll be able to observe various geological features: at the start of the path, a few landslides, then, about a hundred metres further on, the plateau’s large cliffs, formed of black basalt. Below, impressive ravines have been carved out by rainfall. An information board will help you understand these natural phenomena.
(2) The path leads out onto a tarmac road; head up to the Col des Tribles. Its name probably comes from the fact that three paths meet here.
(3) Leave the road again and take the wide path on your left; a little further on, you’ll be treated to a stunning view: in the foreground, the Barrès forest, the plain and the village of Saint-Vincent-de-Barrès; in the background, the southern Vercors (Grand Veymont), the Trois Becs, Montagne d’Angèle, Montagne de Glandasse and the Devoluy massif (on a clear day).
As you continue along this path, you’ll see impressive scree slopes of basalt rocks. A sign will help you understand how they were formed.
(4) Y-junction: Beauthéac, follow signs for Saint-Bauzile. Here, a sign will provide information on the distinctive features of the Coiron plateau. Continue along this path, passing further scree slopes.
(5) As you cross the Rieutord stream, you’ll pass close to the ‘gour de fromage’, which is situated 50 metres above the path. Legend has it that people used to store their cheese in the gour to keep it cool.
Carry on a little further until you reach the basalt organ pipes.
(6) At Riou, turn back and retrace your steps along the same path to return to the starting point (S/E).
Tourist office
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