To get to the start from Sonnay, follow the D51, Route du Dauphiné, and look for Chemin des Carrières at the corner of No. 1535. Follow it, pass the hamlet of Les Carrières and park at the side of the road, before the forest exit.
(S/E) Continue along the Chemin des Carrières towards the hamlet of La Feytaz, and at the junction, turn left, heading due west, following theGR®®65. At the bend to the right, head straight on along the path that runs alongside the woodland before entering it.
(1) At the junction, follow theGR®®65straight ahead and reach the crossroads after skirting a field, at Croix Saint-Martin.
(2) Leave theGR®® and turn left, heading due south, to reach a hamlet.
(3) At the junction, go round the back of the building to the orientation table (or for a break, a table with benches), then take the path that descends south-east to the edge of the woodland. Take the path on the left, then head straight through the undergrowth until you reach a crossroads.
(4) Go straight ahead, continue straight on and ignore the first path branching off to the right. Carry on and return to the car park (S/E).