From Refuge Laval or Refuge des Drayères, follow the GR57 passing by Lac Rond, Lac des Muandes and over Col des Muandes, at 2,828 m (2 hrs). Follow the ridge of Roche du Chardonnet, cross Col de Valmeinier and pass under the north face of Roc de Valmeinier on the Maurienne side to reach Col de la Chapelle. From here a fairly firm track leads to the south face of Mont Thabor, where you'll join the classic route, taking you up to the summit at 3,178m (3 hrs). From the summit, make your way down to Col des Méandes following the usual route.
- To get to Refuge du Mont Thabor: From Col de Méandes (2,727 m), keep to the left (north) of Grand Séru to get down to Lac du Perron (2,450 m) and, roughly following the natural gradient to reach Col de Vallée Etroite (2,434 m), then Refuge du Mont Thabor (2 hrs from the summit).
- For Granges de la Vallée Etroite: From Col des Méandes, you can reach Refuge I Re Magi or Refuge Terzo Alpini via Vallon du Dîner To the south of Grand Séru.
NB: at the start of the season, the north-facing section between Col de Valmeinier and the summit of Mont Thabor can be dangerous if there is still snow (with icy, steep sections).
Option: You can shorten this leg by heading straight down to Vallée Étroite and the refuges of I Re Magi or Terzo Alpini from Col des Muandes ( a little-used path up to the footbridge, and then a busier one thereafter).
More information