Start: Park in the Ruoms town centre car park, "Parking Central".
Follow the white/yellow markings all the way.
(S/E) Depart from the "Info Rando" sign in front of the Tourist Office. Facing the sign, turn right into Rue Président Millerand. At the end of the street, at the signpost "Le Champ des Fours", take the cycle path left (Voie Verte) towards "Pradons/Cirque de Gens".
(1) After 275m, at a fork, signposted "Le Champ du Gras", leave the road on your left for the return journey and continue North on the Voie Verte.
(2) At the signpost "Les Petites Pièces", leave the Voie Verte and take the road left through the hamlet of Mas du Grand Grazel.
(3) After 565m, take the path down to the river. It climbs up the cliffside overhanging the river.
(4) After the meander on the river Ardèche, the path descends again. Follow the river on the rock slabs.
(5) After the confluence with the river Ligne, the path climbs back up North-East and passes the Baume Grenas (cave), which can be seen.
(6) Climb the path to the right for a few metres to enter the cave. With a torch, you can walk along this gallery-like cave.
Follow the path Southwards.
(7) The path leads to a road. Follow the white-yellow markings to the "Le Champ du Gras" signpost.
(1) You are now back to the cycling path. From here, take the Voie Verte back to the starting point (S/E).