Departure from the Verchère car park, which is also the starting point for the La Ruchère cross-country ski centre.
(S/E) Head south on theGRP® Tour de Chartreuse (red and yellow markings). Ignore all the paths and tracks you come across. Continue to the Col de Sarriette crossroads.
(1) Continue on theGRP®, leaving the Col de Sarriette trail on your right. You will reach Tracol.
(2) Leave theGRP® here and head south-west on the path on the right leading to the Col de l'Aliénard. As soon as you leave the woods, you will reach it in its vast meadow.
(3) Begin an easy descent ending at Habert du Billon.
(4) On the left, rejoin the yellow-markedPR® which, slowly through the Prairie de la Folie, leads to the Col de la Ruchère in a large meadow at the foot of the Petit and Grand Som. Join theGRP® of the Tour de Chartreuse.
(5) Continue left along theGRP® and, after a short descent, you will reach the Pré Gervet crossroads.
(6) Take a new yellow-markedPR® trail on the right. Walk past a chalet and then the Oratoire Teste de Lavines. Continue north, still descending, to reach the Habert car park.
(7) Cross the car park to return to the tarmac road, reach Le Cleyat and the D102a road, then turn left to return to the Verchère car park (S/E).
and finally a normal path.