From the imposing Tseuzier dam, set off on a spectacular hike and discover the restored gutters that run along the rock face near Torrent-Croix.
Distance 11.7 km
The Grand Bisse d’Ayent, built in 1442, draws its water near Tseuzier dam. Although the upper part of the bisse has dried up since the completion of the dam, traces of it are still visible along the way. The section known as Les Follés is exclusively for people who are not afraid of heights, as the bisse runs along a rocky ridge. Upon arriving at Torrent-Croix, discover the incredible work achieved by our forebears: the bisse was built in the rock with bare hands and uses gutters attached to the cliff face, immortalized in 2019 on the back of the CHF 100 banknote. The gutters have not been in use for a number of years and the bisse now runs through a 95 m long tunnel in the middle of which a passage leads to a platform offering a magnificent view of the entire set-up. You can choose to end your hike in Anzère or continue to Arbaz. The arrival point is near the Étang Long, located in the centre of the village and popular with fishermen.
At the end of your hike, head for Botyre to discover the Bisses Museum, located in a beautiful 17th century building that has been completely renovated.
Use of the trails and the information on this website is at hikers’ own risk. Local conditions may entail changes to routes. Valais/Wallis Promotion accepts no liability for the accuracy and completeness of information on this website.
For all hikes:
Bring a map. Download full description of this route including large-scale map by clicking on the «Print» icon, top right of this page.
Use marked trails only, and observe all signposting – for your own safety, to safeguard grazing animals and to avoid disturbing wildlife.
Close gates after passing through.
Please be considerate to other trail users, as well as to the plants and animals.
Do not leave any waste in nature.
For mountain hikes:
Take extra care protecting yourself from the sun at altitude. UV radiation can be exceptionally strong, even in cloudy weather.
Plan your hike carefully: take into consideration the fitness level of each participant, the weather forecast and the season.
Weather conditions can change quickly in the mountains, without warning. Appropriate clothing is therefore essential, along with adequate supplies of food and water. In uncertain weather, turn back in good time.
For high-altitude hikes:
Inform others of the route you plan to take. Whenever possible, avoid going alone.
Do not venture onto glaciers without a mountain guide.
Take note of the warning signs that point out the constant danger in river beds and along watercourses below dams and reservoirs: water levels may rise rapidly without warning.
Your hike to the Grand Bisse d'Ayent begins on the wall of the Tseuzier dam and follows the path that descends near the restaurant, leading to the Lienne valley up to where the bisse crosses it. This first part is equipped with a handrail in the steepest places and is exclusively for people who are not prone to vertigo. Alternatively, you can also start the hike at the Samarin PostBus stop to avoid this part. Follow the signposts leading through varied landscapes and admire the vestiges of the past and the incredible construction work done to bring water to the vineyards below. Continue your hike to the Mayens d'Arbaz, where the "Café du Lac" bus stop allows you to return to the valley or your vehicle easily.
all notes on protected areas
Take the train to Sion, then the PostBus line 352 to Tseuzier Dam (operational from mid-June to mid-September).
From the A9 highway, take exit 27 (Sion-Est) and follow the signs to Ayent. Once you reach the village of Saint-Romain, continue in the direction of Fortunau following the signs for Les Rousses. Just after Les Rousses lift parking lot, the road continues through a tunnel and on to Tseuzier dam.
Tseuzier dam has a parking lot.
32T 379500 5133690
Arrival by train, car, foot or bike
Book recommendation by the author
The tourist office in Arbaz and Anzère has got brochures and information material about hiking in the region.