Nature: Arnad, Challand-Saint-Victor

A glacial lake, with water from the subsoil, a niche of interesting species

The Lake Villa nature reserve was established in 1982 and covers 25 hectares at altitudes between 810 and 980 meters.

An oasis of peace where you can listen to the sounds of nature and admire the surrounding mountains. It is interesting to visit it in every season, to admire the colors of the changing leaves, as well as the plant and animal species that inhabit it.

Here is some information on the protected area:

• Environment: low mountain lake-marsh basin characterised by a clear contrast between the marshy lake area and surrounding dry area.
• Fauna: the nature reserve represents the main reproduction station on the regional level for the common toad. Some of the local reptiles include the lizard and the coluber while the fish fauna is made up of cyprinids and eels.
• Flora: the lake waters are home to two floating plants, rare in Valle d’Aosta, the white waterlily and the amphibian lily. The reed field is mainly populated by marsh reeds. Shrubs include hygrophilous woods near the shores and Scots pine and downy oaks on the surrounding sunny slopes.

It may be interesting to combine a visit to Lake Villa with a walk along path 11 which connects Lake Villa to Col d'Arlaz (along stage 6 of the Cammino Balteo trail, Challand-Saint-Victor - Saint-Vincent path) to discover the artistic path with works created using natural materials.

Accessibility
The lake site can be reached by everyone, even by people with disabilities: in the immediate vicinity of the entrance to the path that leads to the lake, there is in fact a parking lot for the disabled and the road surface has been completely paved, to also allow wheelchairs to move comfortably .

How to get there
The municipal road which leads to the site is well indicated at the junction, along the regional road 45 of the Ayas Valley, after the village of Challand-Saint-Victor (a signboard indicates “Natural Reserve of Lake Villa”). 2,5 km after this junction, you will reach a small parking located directly on the side of the road. There you will find a signboard with the description of the site and its principal trails.

The Evançon stream originates from the streams fed by the glaciers of Monte Rosa. It flows down to the valley, near the hamlet of Targnod, in Challand-Saint-Victor, squeezed between the high rock walls, and it forms a picturesque waterfall with a drop of almost fifty meters.

The area is also of historical interest as it is linked to the ancient mines of Sache: one of the entrances to this field is visible on the side to the left of the jet of water.

The path to the waterfall (20 minutes’ walk) starts from the municipal road that connects the village of Isollaz to the penultimate bend downstream of Targnod, a hamlet of Challand-Saint-Victor. It is advisable to park in Isollaz, a hamlet which, in itself deserves a visit also for its parish church, and you can get to it from regional road 45 of the Val d’Ayas.
Once you have parked your car, walk along the municipal road that goes from Isollaz towards S.R. 45 downstream from Targnod for about 5 minutes, until you reach the sign “Cascata di Isollaz” on the left. The path goes down quite a steep incline, with steps carved out in soil and rock, and so they can be slippery if it is humid or after it has rained. The descent reaches a clearing where you turn left and the path, flanked by a fence, becomes flat and follows the course of the stream. After passing two benches you arrive at the astonishing view of the waterfall.