Park in the car park at the end of the Haute-Vallée road, near the Refuge de Laval.
(S/E) Head towards the bottom of the valley without taking the Moutet bridge, staying on the main path until the next fork, which is marked by a signpost.
(1) Turn right and follow an easy climb to reach Lac Long.
(2) Go around the lake on the left and continue towards the pass. Please note that the markings are sometimes difficult to see.
(3) Go around Lac Rond on the right (cairns). Join theGR®57upstream.
(4) Follow theGR® to the right (north-east).
(5) Walk along Lac des Muandes at a distance on your right. Head north then north-east and climb up to Col des Muandes (very beautiful view of Mont Thabor).
(6) At the pass, there are two options:
- Turn right onto theGR® and follow it to Col des Méandes, then turn left and head for Mont Thabor.
- As shown on the map and described below, follow the ridge to the left (north). Reach Roche du Chardonnet.
(7) Continue north-east along the ridge (keep an eye out for cairns). This will take you to the Col de Valmeinier.
(8) Continue along the ridge to the northeast. Caution: some scree and possible passages on gently sloping snowfields. Reach Col de la Chapelle.
(9) Still heading northeast, tackle a very steep climb over yellow-orange scree, characteristic of Mont Thabor. You will reach the junction with theGR®57variant.
(10) Follow theGR® to the left (north) to reach the chapel and then the summit of Mont Thabor (from this very flat summit, you can enjoy a panoramic view).
(11) Then begin the descent via the same route in the opposite direction. Reach the intersection upstream of Lac Rond.
(4) Stay on theGR® to go around the lake on the right.
(3) Follow the same route as on the way up to return to the Laval car park (S/E).