The hike starts at the top station of the Mont Bochor cable car at an altitude of 2,022 metres.
N.B. If you start from the centre of Pralognan-la-Vanoise, allow for an additional 500m of elevation gain.
(S/E) Go around Mont Bochor on the left.
(1) At the crossroads, continue straight ahead and follow the Campanules ski lift line. About two-thirds of the way along the line, turn left onto a path that leads to another ski lift (Creux Noir ski lift). Then turn right and continue climbing along this ski lift.
(2) At the sign, turn right and pass under the Ancolie chairlift line and continue climbing along the chairlift.
(3) At the sign, take the path on the left, leaving the one that leads to the Refuge de Barmettes on your right. Continue climbing; the path follows a passageway through an avalanche barrier. Pass under the chairlift line again and follow the ski lift line once more.
(4) At the "Ancolie" sign, continue straight on towards Col Noir (leaving the Col de Leschaux trail on your left). Continue climbing to reach the pass.
(5) Continue north to reach Col Rosset. Descend eastwards, passing a small lake on your left. You will reach a footbridge over the Ruisseau du Vallonnet stream.
(6) Do not cross the stream but continue on the left (north-east then north) to climb up to the lake (view of what remains of the glacier opposite).
(7) Return to the footbridge.
(6) Take the footbridge and you will soon reach the Chalet des Gardes.
(8) Then turn right and descend the switchbacks.
(9) At the signpost, turn right (west-southwest). Join theGR® at an elevation of 2,236 metres. Continue in the same direction along the GR®. Pass the Chalets de la Glière and continue down into the valley. Cross the Pont de la Glière bridge and reach the Refuge des Barmettes. Continue on theGR®, pass under a chairlift line and arrive at a sign indicating an altitude of 1980m.
(10) Then take the path on the right (leave theGR® trail on the left). Walk downhill and then along the side of a rocky outcrop. Further on, pass the Ancolie chairlift departure station and then a crossroads you took on the way there.
(1) Turn left to reach the upper cable car station (S/E).