Walk along the turquoise waters of Cleuson Lake (2'186 metres) and cross the dam. On the banks of the lake, this is the highest and most ancient standing chapel in the commune. The chapel Saint-Barthélémy overlooks the Valley of Nendaz and the panoramic view extends as far as the chain of the Bernese Alps. The exact date of its construction is unknown, but a document of 1447, signed by the bishop of Sion, mentions that 40 days of indulgence would be accorded to whomever gave alms in favour of the chapel, which leads one to presume that the edifice is prior to that date. Before the construction of the dam, it was situated in the valley of Cleuson, on the right bank, slightly uphill. Built of wood, it was renovated on several occasions, the last time in 1888. In 1951, the men working on the dam constructed a new stone chapel at the present site.

Go down towards Siviez by a small footpath in the forest. From its source, follow the Bisse de Saxon to the Cabane du Bourlâ before reaching the village of Haute-Nendaz (1'350 metres).

The Bisse de Saxon is partially supplied with water and extends from Siviez to Saxon, a village located in the Rhone Valley, making it the longest bisse in the Valais with its 32 kilometres.

OPTION

When you arrive in the heights of Siviez, walk uphill towards Basso d’Alou and reach Tracouet by following the ridge to the legendary Dent de Nendaz (2'463 metres). From the summit, enjoy the panoramic view over the lac Noir, the Alpes and the Rhone Valley.

At Tracouet (2'200 metres), you can stop for a break at the restaurant before continuing down to the village of Haute-Nendaz via the gondola or on foot.

Beware ! The ridge between Basso d’Alou and the Dent de Nendaz includes some fairly technical passages, of which one especially equipped with metallic steps. It is not recommended for hikers with little or no training. In this case, prefer the return to Haute-Nendaz via the bisse de Saxon.