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!