Park at the hamlet of La Gorraz; for directions, see Practical Information.
(S/E) Head due south along the road to reach the hamlet of Les Foyères. Carry on, turning 180° to the right, continue uphill and reach another hairpin bend.
(1) Leave the road here, continue straight ahead along the path and cross the Torrent de la Clef. Stay on this path, ignoring the paths leading to Le Golet and La Tuile. Follow a series of hairpin bends to reach the Montagne d’en Bas mountain pasture (then the Montagne d’en Haut).
(2) Turn right and you’ll soon come to a crossroads of paths. Turn left and continue through the woods until you reach a small clearing.
(3) Cross the clearing, re-enter the woods and pass close to a lovely wetland area at the source of the Ruisseau de l’Avalanche. Complete the climb to reach a wide-open mountain pasture and then the Col de l’Arc. Enjoy the beautiful view here, with Mont Bellachat in the foreground.
(4) Then head back down through alpine pastures and woodland, passing the Chalet de la Fraitière.
(5) You’ll occasionally pass pastures with sheep. See the section ‘During the hike’ for more details.
Continue the descent until you reach the forest road at a place called Les Charmettes.
(6) Cross the road and keep to the path opposite, then cross the road three times. Turn left onto the road to return to the junction you passed on the way out.
(1) Follow the route back in the opposite direction to return to the Gorraz car park (S/E).