Built in the 1450s, the upper part of this bisse has been abandoned. It is the most vertiginous bisse in central Valais

Total length : 8 to 10 km.

Altitude : Between 950 and 700 metres.

Route time : Between 2 and 3 hours.

Location :  The Lienne valley above St Léonard, to the right of the Rhône.

Difficulty : A stretch of the trail is quite sheer and not recommended for those suffering from a fear of heights. 

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

Best period : June to September.

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

Departure 

From the village of Chelin (Flanthey), cross the village and take the Route de l'Ormy. The beginning of the bisse can be found above the road about 300 metres after the village (GPS 46°15’52’’ M 7°26’24’’ E).

Itinerary

Follow the bisse west and when you enter the Lienne valley the trail becomes quite impressive and spectacular. Continue to the bottom of the small valley where you can join the itinerary for the Bisse de Lens or the Bisse de Clavau.

Enlarge and Print Itinerary

Interactive Map

Interactive Map Sillonin - Lens

Public Transport Timetable

This bisse passes cheer cliffs and is quite spectacular. However, in terms of safety comparable with the Bisse de Savièse. You will need to be sure footed and not suffer from a fear of heights. Consider setting off in only in the best weather conditions and equipped with good walking boots. We strongly discourage this walk in winter, in poor weather or with children.