The starting point is located on the edge of the D517 between Crémieu and Trept. Parking is available near the entrance to the woods. There are two car parks (altitude 256m).
(S/E) Take the path that enters the woods, heading south.
(1) Turn right. Continue straight ahead for about 1 km, ignoring all the paths on the right. There is a "cave" on the left.
(2) Continue left along the path that climbs uphill. This is the only difficult part of the hike. At the next fork, turn left and continue uphill.
The IGN map is not up to date
(3) Turn right and follow the path between the fields. At the end (next to the altitude 368m), continue left on a path for 300m.
(4) Crossroads (altitude 349 m). Take the second path on the left (south-east). Leave the first path on the left
(5) Turn right. Continue straight ahead, south or south-southeast, for about 1.5 km, ignoring all the paths branching off to the sides. Pass the altitude 390 m.
(6) Turn left onto the path that enters the woods. At the next two forks, turn right, heading due south.
(7) Turn left, heading north-east. Continue straight ahead downhill for approximately 1.1 km, ignoring all side roads. Pass the altitude 314m.
(8) Continue left on Chemin des Montées for 1 km. Join another path. Turn right, heading due east, for 100 m. Pass the altitude of 323 m. There is a hunters' hut on the left.
(9) There is a horse paddock. Continue left along the path, heading north-northwest. Pass the altitude 299m.
(1) At the signposts, turn right and follow the same path as on the way out to the starting point (S/E).

