Start from a small, shaded, unpaved car park (max. 6 cars) on the right (located at elevation 404) on the D7, approximately 3 kilometres from Val-Suzon-Haut, heading towards Blaisy-Bas.
(S/E) From the car park, turn left onto the main path which runs alongside the Rui Blanc on theGR®2(red and white markings).
(1) At a junction (spring: source of the Rui Blanc), leave theGR® and head up to the right along a path that climbs steeply. Pass under the bridge and then rejoin it (steep slope).
(2) When you reach the top of the steep slope at the entrance to the Ancien Tacot bridge, turn left and follow the old railway line (you will then be overlooking the Rui Blanc valley). When the path bends to the left, do not head back to the car park via the paths leading down to the right, but continue along theGR®2to Val Courbe.
(3) Cross the D7 to the right and follow it for about 150 metres to reach the Gué du Val Courbe ford, then follow theGR®2. Pass the two fords and turn left. After the ruined mill, turn left and follow the Suzon stream through the woods, skirting the meadows.
(4) In the hollow of a wide bend on the left, leave theGR®2and turn right into the Combe Vaux de Roche.
(5) 900m further on, turn left into the Combe Beudon: cliffs to the right and left where peregrine falcons nest. Go to the end of the valley and turn right to return to a parallel path that climbs up through the scree.
(6) Descend via the path on the right to admire the view below and opposite: a falcon’s nest. Head back up the path, rejoin the track on the right along the cliff edge beneath the woods, and descend a stony slope via steps through the boxwood. Go straight on at a junction and continue to the cave.
(7) Arrival at the Grotte des Célérons: a tunnel passage leading into the main chamber with a large opening in the middle of the cliff: stunning views, picnic area available in the shelter.
Return via the entrance tunnel and take the descent to the right through the scree to reach the valley. Turn right and after 200 metres take a path to the left (after passing an old, rusty coalman’s pot on your right). Climb through the boxwood and reach the end of the world: admire the chimneys.
(8) At the End of the World, turn right and follow the cliff before a short climb to reach the plateau. A path continues to the left through boxwood and scrubland. Ignore all the paths branching off to the right and head for the Creux Percé
(9) A vast karstic cave with a circumference of 50m: walk around it, then take the path heading due west.
(10) After 300m, at a T-junction, take the wide, carriageable track to the right for 800m until you reach a crossroads where a clearing often holds huge piles of cut timber.
(11) At this junction, take the track on the left for 200m. Then leave this track to the right and, at elevation 493, take a small path on the left that descends gently into a small valley.
(12) At the end of the valley (elevation 418m), take the path on the left and continue straight on until you reach a four-way junction.
(13) Turn sharply right and, after about 150m, cross the Suzon. Then join the D7, which you will follow on your left for 1km before reaching the car park, the starting point (S/E).