Built in the early fifteenth century, this bisse is also called the Grand Bisse de Vex. There is water along its entire length and it has been completely restored. The stretch between Veysonnaz and the Mayens de Riddes is suitable for push-chairs and those with reduced mobility. 

Total length : 12 km.

Altitude : Between 1500 and 1350 metres.

Route time : Approximately 3 hours, without the return trip.

Location :  Planchouet, Veysonnaz, Mayens de Sion, to the left of the Rhône.

Difficulty : There are no particular difficulties. 

Ordinance Survey map 1 : 50'000  no. 273T Montana.

Best period : May to October.

This bisse contains water from mid-May to mid-October.

Departure

This bisse can be walked from the Mayens de Sion East (sign-posts), or from Planchouet chapel by continuing to follow the very steep road that descends towards the valley floor. After about 200 metres decent you will reach the starting point the bisse on your right (sign-posted).

Itinerary

When you reach Veysonnaz, going from Mayens de Sion to Planchouet, the bisse continues immediately after the gondola station, and, in the Planchouet to Mayens de Sion direction, the bisse continues just below the road and joins the "Piste de l’Ours" (follow the sign-posts).

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Interactive Map

Public Transport Timetable

The route between Veysonnaz and Planchouet is out of service until July 10 2021 due to a landslide.

Navette des Bisses: A shuttle bus runs between the start and end points of the Bisse d’en Bas, Bisse du Milieu, Bisse Vieux and Bisse de Vex. Please consult the timetable at the local tourist office. 

This bisse is part of the itinerary «Chemin des bisses en 3 jours de marche» about which you can find details on this site.

During the summer, the stretch from Veysonnaz to Mayens de Sion is very busy and is suitable for push-chairs and those with reduced mobility.