The route starts from the car park at Saint-Jean-de-Gonville church.
Unmarked sections
(S/E) Heading due north, follow Rue de l’Église to a crossroads marked by a fountain, then turn left and head up Rue du Gachet.
(1) Just after passing the last houses, turn right onto a path and continue straight on at the junction with another path. You’ll reach another path near the Pierre du Neyret (optional left turn in 5 minutes).
(2) Continue to the right, then very quickly turn left at the next junction. A little further on, turn right at a Fork in the road and pass by the Maison Driset. When you reach another path, continue straight ahead on the track, then turn left for a very short climb.
(3) After passing the two boulders of the Pierre du Paray, follow the edge of the field to the path and follow it to the right. Ignore thefirst junction on the right, then at thesecond continue straight on along a path. You’ll reach a junction not far from the end of a forest track.
(4) Continue to the right, then at a Fork in the road take the right-hand branch. After a short descent, you’ll reach a junction: continue straight on, following the path uphill (note that this is not shown on IGN maps). After a short stretch with little change in elevation, look out for a discreet path on the left.
(5) Follow it uphill. You will reach a hut.
(6) Continue along the path to the nearby forest track. Follow it briefly to the right and then turn left onto the path. Further up, you’ll reach another forest track.
(7) Follow it to the right for about 1.1 km, down a gentle slope. At a clearly marked junction, continue left onto the ascending path. You will join the path coming from Tiocan
Marked sections
(8) Turn left either onto a “shortcut” path according to this route (not shown on IGN maps), or just after the signposted route. Continue along the path, which includes some steep slopes.
(9) At the Croisée junction, continue straight on towards Narderans along a path running at the foot of some cliffs. You will reach a vast area of mountain pastures near the Chalet du Nardérans.
(10) At the junction, continue straight on, climbing briefly up the valley until you reach the edge of a basin. The path then turns right and runs along the foot of a long cliff face: after another short climb, the Reculet, topped by a clearly visible cross, appears directly ahead.
(11) The summit offers a 360-degree panoramic view (notably towards Lake Geneva, the Alps and the Jura). Descend to the south-west towards the ridges, then continue along a path with a series of short ascents and descents. Further on, you’ll reach an isolated rocky peak.
(12) Follow a narrow path to the right running along the foot of the rocky spur and you will soon reach the Grotte de la Marie du Jura (it is not very deep). Continue along the path and join the ridge line, then shortly afterwards the marked route. Caution: this entire section requires a degree of vigilance; however, it can be avoided ( see Practical Information for further details).
Continue southwards, beginning a steep descent. From here, the route involves a long series of ascents and descents. Reach the summit of the Pierre de la Lune.
(13) You will begin to see the Gralet area: continue through a slightly more wooded environment, with a few more ups and downs. Reach the Passage des Chézerands on the edge of another open area. (Optional access to the Chalet du Gralet, 5 mins away).
(14) Head left towards Feigères and Péron. After a long descent, cross a forest track, then take asecond one near its end.
Unmarked sections
(15) Head left, then shortly afterwards continue along a downhill path joining a track.
(16) Turn right and follow the path for about 800 metres: take a poorly marked path on the right and very quickly follow another, better-marked path to join the Chemin de Pré Bailly at elevation 693.
(17) Continue to the right and very soon turn left onto a track. Further down, you’ll reach a small tarmac road (Chemin de la Grande Vie). Then head back to the junction from the outward journey.
(1) Continue straight on and return to the car park (S/E)