The fourth stage of the classic Haute Route leads from the Cabane de Prafleuri (2624 m) over the Col des Roux to the Lac des Dix and then on to the Cabane des Dix (2928 m). Unlike the heavily glaciated stages of the following days, the focus here is a varied route through the wide high mountain terrain of the Val des Dix.
At around 10.6 km, with 730 m of ascent and 470 m of descent, this is one of the more moderate sections of the Haute Route. The long traverse along the Lac des Dix, however, can become laborious in poor snow and weather conditions.