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From Aussois, take the D108 up to Plan d’Aval. Walk alongside the first lake to reach Plan d’Amont and park to the left of the dam.
(S/E) From the car park, turn right onto the path running along the western shore of Plan d’Amont. At the end of the lake, you’ll reach the Pont de la Sétéria.
(1) Turn left onto theGR®5(do not cross the bridge) and head up through the mountain pastures.
(2) At the fork (altitude 2426), leave theGR®5and continue straight on along the path winding upwards to the Col de la Masse. The terrain becomes increasingly rocky.
(3) On reaching the Col de la Masse (elevation 2922), head due north, taking a clearly visible path to the right along the ridge. The ridge is fairly wide and presents no technical difficulty (difficulty rating T3). Continue along this ridge until you reach a small, unnamed pass to the east of the Grand Roc.
(4) Once at the unnamed pass, turn left onto another, steeper ridge (grade T4) to reach the summit of the Grand Roc (elevation 3,316). This ridge is slightly narrower and requires you to use your hands a little, but the large boulders are very stable, providing secure handholds and footholds.
(5) From the summit, return along the same route to the junction at elevation 2,426.
(2) Turn right, heading due south, onto theGR®5for approximately 300 m.
(6) At the junction (alt. 2380 m), leave theGR®5and turn left towards the east to descend towards Plan d’Amont for about 200 m.
(7) At another junction (alt. 2,340 m), turn right towards the south-east in the direction of Le Pisset.
(8) At Le Pisset, continue straight on eastwards to return to the car park (S/E).
Visorando Member
Difficult 
Tourism professional
Moderate 
