Starting from Le Recoin in Chamrousse.
(S/E) Follow theGR®549trail, passing through the Aiguille ski lift and leaving two trails on the left.
(1) Pass the Col de la Balme at the top of the ski lifts coming from Casserousse.
TheGR® leaves the slopes on the right to climb eastwards through the forest and then over a long scree slope to the north-west of the Croix de Chamrousse (below). Cross the steep "men's" downhill slope.
(2) Stay on theGR® to reach the Brèche Sud, known as Robert 2020 m. Descend towards the lakes.
(3) Go around them on the right. Leave the path on the right that goes to Col des Lessines to reach the hut.
(4) From the hut, leave theGR® trail on the left towards the north, which leads to La Pra. From there, there are no more markings. A vague trail climbs eastwards through a cone of scree; follow it upwards. In half an hour, you will find yourself in a chaos of boulders with numerous cairns on the left and right.
(5) Find your way through the boulders to the start of the Combe du Grand Sorbier.
The path is still invisible. Continue through the boulders to the right on the left bank of the combe, then through a finer scree slope that passes under the Aiguille du Mottin.
(6) A large cairn marks the start of the summer couloir on the left. This passage is quite steep, so caution is advised.
(7) Find another cairn on the ridge. Make sure you locate it clearly, as it is best to take the right couloir for the descent. Once on the ridge, it is easy: two small peaks on the right overlook Les Vans to the south. Pass along them, then a small pass, and climb north-east towards the summit of Grand Sorbier (the summit cairn is clearly visible).
(8) Descend via the same route to the Cabane des Lacs Robert.
(4) Leave theGR®549on your right again and head left between the two lakes to rejoin the outward route, which leads to the Brèche Robert Sud.
(2) Leave theGR® on your left and descend to the small Lac des Pourettes at 1,819 m.
(9) It is in the forest. Shortly after the lake, keep left (leaving theGR® de Pays on your right, which descends to the Casserousse car park).
In the forest, a few ascents and descents to the west lead to the side of the Casserousse track below the Col de la Balme.
(10) Pass La Balme, near the Cargneule cave (climbing school). Cross the track from east to west to take a good path to the Col de l'Aiguille.
(11) Find the track that climbs to Col de l'Aiguille (1,819 m). Le Recoin is at the bottom, so all you have to do is gently slide down to join theGR® trail that takes you back to your car (S/E).

