Park in the car park of the Désert d'Entremonts cross-country ski stadium.
(S/E) Continue south-west along the path running alongside the road (D45); this is theGR®9, which also forms part of theGRP® Tour de Chartreuse. Head to the Bruyères car park, at the foot of the ski lifts.
(1) Leave theGR® and turn right onto the path to reach the Col du Grapillon.
(2) Turn left to reach the Cochette viewpoint.
(3) Head back in the opposite direction, downhill, to the Col du Grapillon.
(2) Take the yellow-marked path opposite, reaching the Pas du Cuert – be careful here: an exposed section, followed by a climb requiring the use of your hands. Reach the plateau, then the summit of Mont Outheran.
(4) Continue across the long plateau of Mont Outheran, paying close attention to the yellow markings as it is easy to lose them. Reach the Chalet de l'Outheran.
(5) Continue straight ahead, following the cliff, to reach a series of viewpoints over the Bourget valley. Reach the final viewpoint.
(6) Return to the crossroads by the chalet.
(5) Turn left onto a magnificent descent, a little steep but very scenic, leading down to the valley at a place called La Serra.
(7) Turn right onto the wide, well-maintained path to return to the car park at the Désert d'Entremonts cross-country ski stadium (S/E).