Bisses are the historic irrigation channels of the Valais. A bisse is an open ditches delivering priceless water from mountain streams – often by daring routes – to arid pastures and fields, vineyards and orchards. Many bisses are still in use today and so are carefully maintained. Numerous trails accompany these historic watercourses, inviting visitors to varied hikes on historic trails.
Bisse de Sion
The Bisse de Sion draws its water close to the spectacular sources of the river Lienne. At the start of its route, this bisse crosses the Lourantse torrent via a wooden aqueduct. It runs alongside the lake of Zeuzier and leaves the Rawyl basin through a series of tunnels. Cut into the rock, the channel passes over a chasm which plunges 200 metres, after which it adopts a less dramatic route.
Destination: Mayens d’Arbaz (1'310m)
Distance: 15 km
Vertical metres: +150m, -610m
Hiking time: 4h
Restaurants and pubs: Tseuzier Barrage, Les Rousses, Anzère, Ayent, Maynes d'Arbaz