Park in Musselin, a district of Saint-Baldoph, in the car park next to the École des Sources school.
The route is marked with yellow or red and whiteGR®96markings, depending on the section.
(S/E) Head west towards the mountain via Route de la Cornaz. At the wash house, turn right. After about 50 metres, turn left; the markings begin at this point. After about 100 metres, leave the road and take a path on the left at the edge of the vineyard. Join the Route des Lamettes, first turn right then left and climb up a path to the Route du Mont Charvais, at a hairpin bend.
(1) Immediately turn left onto a small dead-end road. Soon leave it for the path that starts on the right. Join a road near a large building and follow it to the right.
(2) At the intersection that quickly appears, continue straight ahead and rejoin the main road at a hairpin bend. Follow it to the left and, after about 20 metres, take the path that starts on the left. After about 50 metres, turn left. The path climbs quite steeply through the pine trees and, after a few hairpin bends, arrives at the signpost for "Le Tron".
(3) Turn left to reach Mont Charvais: information board and panoramic view. Retrace your steps to the signpost.
(3) Then descend to the left until you reach the road that can be seen through the trees. Follow the road to the right and descend for about 500 metres. Directly below a high-voltage power line, leave the road and climb up the path on the left. Pass under the high-voltage power line twice in succession and, at the fork after the second time, turn right (follow the markings). A steep climb leads to the Coche pass and the eponymous cross nearby on the right (panoramic view).
(5) Retrace your steps and, at the signpost, head towards Bec du Corbeau via theGR®96; take the wide path heading south rather than the narrow path heading south-west along the edge of the cliff. Staying on the marked path, climb up to an intersection with a signpost marked "Sous le Bec du Corbeau 740 m".
(6) Turn right to quickly reach Bec du Corbeau. Panoramic view of Chartreuse, Épine and Lac du Bourget.
(7) Return to the previous junction.
(6) Turn right and continue southwards uphill on theGR®96for a peaceful walk through the forest. Further on, the path begins to descend to the Grande Montagne junction.
(8) Leave theGR®96here and descend to the left. Paying attention to the yellow markings, join a road. Follow it to the left and downhill to the signpost for La Curia.
(9) Turn right to descend along a path. Ignore a path on the right and then one on the left. You will come to a service road for a housing estate and continue along it.
(2) At the intersection you took on the way there, turn right at an acute angle. Then turn left to rejoin the road at a hairpin bend.
(1) Take the path on the right at an acute angle and, following the same route as on the way there, return to the car park where you started (S/E).