Water is readily available in the rivers you cross and at the Chalet de l’Alpetaz (Day 1), where water is drawn from a spring. However, as there are sheep in the area, you should take care to ensure that the water has not been contaminated.
The hike includes a bivouac at 2,200 m, so you’ll need to set off with suitable equipment for spending a night at this altitude.
The hike requires considerable mountain experience and good navigation skills. Part of the route follows very little-used paths, which are little more than flattened grassy tracks. At times, they disappear completely. Signposting is virtually non-existent along the vast majority of the route.
A map is therefore essential. A compass is also required to help you find your way in the event of fog.