Take part in an ascent to the Moiry dam via Vercorin and Pinsec, with views of the Matterhorn and Dent Blanche in the background.

Your ascent begins in Chippis, a small village on the plains, on the banks of the Rhône. A small road takes you to Brie, passing close to the Ricard bisse, then rises for a few kilometers above Sierre, before joining the main road to the resort of Vercorin. The route then skirts cliffs and passes through galleries cut into the rock, allowing you to admire the Val d'Anniviers stretching out below you. At Vercorin, the route heads towards Pinsec and then descends for several kilometers, passing through the typical hamlets of Mayoux and Saint-Jean. As you start to climb again, the backdrop to your ascent is the Matterhorn and the Dent Blanche, and the road is wide and rolling on the first part. From the picturesque village of Grimentz onwards, the effort becomes more substantial, with a steep gradient for five to six kilometers, before a brief flat and two demanding final kilometers to the Moiry dam. The finish at 2250 meters altitude is located near the crown of the dam overlooking the lake.

For those wishing to reduce the effort, a start will be possible from the magnificent village of Vercorin at the Place du télécabine from 10:00 am. This means that the distance to the Moiry dam will be just 22km, with 1240m of ascent. For those participants who will be travelling to Vercorin by car, it is imperative to start the climb from Chalais before 9.15am.

The passage through Vercorin will also provide a welcome break for participants departing from Sion.

Road Closure Schedule:

  • Chippis – Briey – Chippis: 09:30 – 13:00
  • Vercorin – Briey: 09:15 – 13:00
  • Briey – Vercorin: 09:30 – 13:00
  • Vercorin – Bif. Ziettes: 09:45 – 13:30
  • Bif. Ziettes – Mayoux: 09:45 – 15:00
  • Grimentz – Mayoux: 09:45 – 15:00
  • Mayoux – Moiry Dam – Mayoux: 10:00 am – 3:00 pm



Vertical rise

1800mD+ (1,800ft)





Access from (Place du Scex, Sion from 9:00 am):

  • The Sion train station is located in the immediate vicinity of the Welcome Village. Access by public transport and/or bicycle is recommended.
  • The Scex, Roches-Brunes and Planta parking lots are in the immediate vicinity of the Village d'Accueil.

Access from (Place du Télécabine, Vercorin from 10:00 am):

  • The Place du Télécabine is located in the center of the village and can be reached on foot or by bike from the Chalais-Vercorin cable car.
  • The Télécabine parking lot is in the immediate vicinity of the Welcome Village. By car, please note that it is imperative to start the ascent from Chalais before 9.15 am. 

Good plans:

Area information