To return to the car park where you started, after leaving Termignon, leave the D1006 at the first hairpin bend onto the D126 and drive 12 km to the car park at 2,300 m. Park on the right in the lower car park.
(S/E) At the top of the car park, take the footbridge to the east and join theGR®5.
(1) Take the track on the right and admire the pretty Arcelles alpine chalets with their slate roofs.
(2) Cross the Piou stream and continue along the track. When you see the chalets of La Femma, you can either take the old access road or continue along the track. After La Femma, the track gives way to the Turra de Termignon trail.
(3) After crossing a stream, leave the path and head off-trail, heading south-southeast towards the Col du Petit Vallon. Cross the Ruisseau des Sallanches and then veer left towards the pass.
(4) At around 2660 m, head for a distinctive rock, then go around it, either on the right (recommended) or on the left. You will then reach the Col du Petit Vallon.
(5) At the pass, take the time to admire the landscape. La Dent Parrachée is behind you and the Grand Roc Noir is to the right of your first objective, the Pointe du Grand Vallon.
Then turn left onto the wide grassy ridge towards the Pointe. The slope is gentle at the pass, but gradually becomes steeper, although there is no risk of slipping.
(6) When you reach 3,100 metres, pass under the point with an altitude of 3,133, descend a little, then reach the small lake of melted snow and finally the Pointe du Grand Vallon. The landscape is magnificent; the Grand Roc Noir is close by and impressive.
(7) From the summit, locate the small pass at an altitude of 3101, the start of the descent route. Reach it by descending about ten metres from the summit and following a trail that branches off to the left.
(8) At the small pass, look for the trail that joins the first snowfield, all that remains of the glacier. This steep, north-facing descent on gravel is quite slippery, so be careful. Continue the descent along the snowfields, then in the Coins traverse, look for cairns that lead east-northeast towards the Lanserlia Lakes. The bottom of the descent is on a steep slope with large boulders, and then the terrain slopes down towards the lakes. There, move to the left and head for the cairn that borders the Col de Lanserlia trail.
(9) Take the path on the left, then follow the first lake and take the trail on the right that climbs up to the small pass between the two peaks of Lanserlia.
(10) Climb to the right for a round trip to the highest peak of Lanserlia.
(11) From the summit, return to the pass.
(10) Reach the peak with an altitude of 2,879 m.
(12) Turn back and quickly turn right onto the slope as soon as you see a clearly visible trail below. The slope is not steep and has steps where crampons grip well. Turn right onto the trail.
(13) Then join the normal route up to the lakes and pass the first pool on the left. Leave the path by turning right and follow the Ruisseau du Piou stream on the left bank until you reach theGR®5.
(2) Turn right to reach the car park via the track (S/E).