Go with the flow in Anzère

The Grand Bisse d’Ayent – for experienced hikers

See it on the new 100-franc note. Experience it first-hand!

Built in 1442, the Grand Bisse d’Ayent takes its water directly from the River Lienne, beneath the imposing wall of the Tseuzier dam. It serves as the traditional water supply for the meadows and vineyards of Ayent and Grimisuat and ends its journey in the Etang de Revouire. To reach your destination, you will start your hike on the wall of the Tseuzier dam, then descend to the Lienne Valley until you reach the intersection with the bisse. Here you will be able to admire remnants of the past and the staggering work of our ancestors.

Note: the bisse is a mountain path to a place called “La Forniri”. It is a spectacular route which is not recommended for those suffering from vertigo. Altitude: between 1,800 and 1,300 metres. Go with the flow from June until the end of September.

Travel details

Duration 3 hours 30 min
Difficulty medium
Distance 18.0 Kilometres
Altitude difference 300 Metres
Arrival PostBus number 352 – Departing from Sion, station: 9:38 a.m. – Arriving in Anzère, Tseuzier Dam: 10:33 a.m. – Runs from 25 June to 17 August, then exclusively on Saturdays and Sundays from 20 August to 25 September
Return travel PostBus number 342 – Departing from Arbaz, Café du Lac: Mon-Fri: 3:37 p.m., Sat-Sun: 4:38 p.m. – Arriving in Sion, station: Mon-Fri: 4:18 p.m., Sat-Sun: 5:20 p.m.

Other things to do in Anzère

 Start climbing and walk along the watercourse from Anzère to Crans-Montana, a route that follows the legendary Bisse du Ro irrigation canal. The route starts at Tseuzier Dam, and continues until it reaches Lake Grenon in Crans-Montana. 
The hanging footbridge gives walkers a momentary rush of adrenaline, whilst being completely safe. Perched 70 m above the gorge, the footbridge measures 120 m in length.
Walk duration: approx. 3 hours
Your trip to Crans-Montana

Walk around Lake Tseuzier

High mountain scenery for everyone to enjoy. 
This lakeside route is an easy walk with breathtaking scenery. 
Walk duration: approx. 1 hour 30 minutes

Grand Bisse de Ayent

Additional information

Buy ticket

Buy your ticket from the SBB Shop or SBB Mobile app. You can also buy a ticket from the driver, at all ticket terminals, PostBus sales offices and at the counter of your nearest railway station.
Additional ticketing apps and online shops can be found in our overview.

Timetable / travel information

You will find the entire Swiss public transport timetable online here.


For groups of 10 people or more, a reservation is required by no later than 4 p.m. on the previous day. Tel. 0848 40 20 40

Bicycle transport

Bicycle transport fixtures available in/on the vehicle.
You can find more information at Biking and Postbus.

Bicycle transport remark
Booking is strongly recommended

Wheelchair accessibility

Wheelchair accessibility is not guaranteed in the Postbus

Wheelchair accessibility remark
Upon request at 0848 40 20 40

Contact details


PostBus Ltd
West sector
Avenue de la Gare 6
1401 Avenue de la Gare 6