

This section of the GR5 links the Trébentaz refuge with the Chésery refuge in the Swiss Chablais region, via the Col de Bassachaux.
From the refuge de Trébentaz, you'll follow a balcony trail to the Col de Bassachaux, culminating at 1,800 meters. From here, you continue on to the Chésery refuge for a stopover in the Swiss Chablais region.
The route starts from the Trébentaz refuge. Your day begins with a short climb to the Col des Mattes (1980 m), where you join the main GR5 route.
Under the majestic gaze of Mont de Grange, you walk along the mountainside to the Col de Bassachaux. From the col, you'll enjoy breathtaking views over the Abondance valley, the Aulps valley and Lac de Montriond.
You'll then reach the Col de Chésery, the gateway to Switzerland, and the refuge, a former 19th-century cowshed on the shores of Lac Vert. In this idyllic setting, a family of shepherds will give you a warm welcome and introduce you to local produce and Valais specialities - an authentic immersion in Alpine culture!
Office de Tourisme Leman Mountains Explore - 24/11/2025
leman-mountains-explore.com
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Lakeside or by stretch of water
Lake view
Mountain view
Close to GR footpath
From 24/06 to 17/09.
Accessible except during snow and depending on weather conditions.
Please check with the Tourist Office for the latest information on access conditions. Reservations are required for the refuge. This route is usually suitable for strong walkers during summer, and autumn, except in adverse weather.
Phone : 04 50 73 51 41
Email : lachapelledabondance@ot-peva.com
Stone
Ground
Grit
Topo guides references :
On sale in the tourist offices of the Abondance valley.
Map references :
Map of the Portes du Soleil hiking trails in France and Switzerland
TOP 25 N°3528 ET Morzine Massif du Chablais Les Portes du Soleil
Yes. Dogs must be kept on a leash due to the presence of herds, Natura 2000 reserve and hunting reserve.