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At Roche Béranger, park on the Route de la Croisette near the residence of the same name. The start of the hikes is indicated by signs next to the Croisette chairlift.
(S/E) Turn left, heading north, onto the path that runs alongside the road towards Lac des Vallons. At the end of the path, turn right onto the track.
(1) Cross a wide ski slope and take the path opposite that climbs between the trees (signpost). When you reach another ski slope, cross it as well and take the path opposite that leads to an open area with beautiful views of Le Recoin and the Grenoble valley on your left. Follow the path that turns left and then right and leads to Lac des Vallons. Go around the lake on the right.
(2) Turn right onto the track that climbs towards the Lacs Robert.
(3) Turn right onto the path that climbs up through the meadow. The path then enters the forest and becomes steeper and rockier. At the top, take the flat, pleasant path on the left. Pass by a small marshy lake.
(4) At the signpost, keep left towards the rocks, following the yellow markings. Do not be tempted to turn right towards the Couloir de Casserousse. From this point, the route becomes difficult until you reach the Brèche Sud, with large rocks to climb over and steep ascents and descents. Follow the yellow markings on the rocks. You will arrive at the Brèche Sud with the Lacs Robert in view. Walk along the lakes on the right.
(5) At the hut, head towards the Col des Lessines. The climb is steep and ends with a rock climb.
(6) At the pass, turn right towards Croix de Chamrousse. The trail winds along the mountainside through a desert-like landscape. Arrive at Col de la Botte.
(7) Turn right towards Croix de Chamrousse. Pass Col des Trois Fontaines, then take the wide track on the left which leads to the Croix de Chamrousse esplanade at the pylons.
(8) Head south-east to quickly reach the two orientation tables (magnificent landscape).
(9) Retrace your steps.
(8) Next to a restaurant at La Croix, take the stony road heading south-west to reach Roche Béranger. Take a short detour to the left of the track to see Lac Achard below.
(10) Continue north-west along the track.
(11) At the signpost, turn left onto a wide grassy track, which is more pleasant than the stony track. Keep to the right, then cross the meadows, rejoin the track below and follow it to the left. You will arrive at the artificial lake of La Lauze (de Roche). Turn right and head towards La Croisette (S/E).
Regulations at Lac Achard
Visorando member
Difficult 
Very difficult 
