Park at the car park of the Chambran chalet refreshment bar.
(S/E) Take the stone path (GR®54du Tour de l'Oisans) marked in red and white that leads to Mas de Fourchier.
(1) Follow theGR®54to the right and leave the path that continues straight ahead (direct access to Lac de l'Eychauda). Continue along theGR®54marked in red and white to Col de l'Eychauda (2,425 m).
(2) Begin the descent by going around the artificial lake on the right. Continue the descent for about 500m.
(3) Turn left towards Pas de l'Âne and start the climb (100m elevation gain) following the marked trail that will take you to Pas de l'Ane at 2,494m.
(4) Continue along the narrow, steep path to reach the Montagnolle valley. Once in the valley, follow the path that branches off to the right.
(5) Take the path on the left that climbs up to the Col des Grangettes (2,684 m). Gradually, the terrain becomes very rocky. The final stage of the climb is steep and rugged, but well secured with handrails in the difficult sections. You will reach the Col des Grangettes.
(6) Descend to Lac de l'Eychauda.
(7) Continue the descent along the marked trail to reach the Vallon de Chambran.
(1) Retrace your steps back to the car park (S/E).