Collontrek
The cross-border mountain race uniting Bionaz with Switzerland, crossing the Col Collon at 3080 metres
About Collontrek
A Race Between Two Nations
Collontrek is an international mountain race that links the Aosta Valley to the Swiss Canton of Valais. The course, approximately 22 kilometres with a 1250-metre positive elevation gain, starts from the Place-Moulin dam (1989 m), at the end of the Valpelline in the Municipality of Bionaz, crosses the Col Collon at 3080 metres over the glacier, and finishes in Arolla (2006 m), Switzerland.
On the Smugglers' Trails
The route follows the ancient smugglers' and shepherds' trails that have connected the two valleys for centuries. The course consists of alpine paths (48%), glacier (16%), mule tracks (30%), and short road sections, classified as SAC T4: a challenging itinerary, reserved for those prepared for high mountain environments and the variable conditions of glacial terrain.
Bionaz, Heart of the Valpelline
The small Municipality of Bionaz, in the province of Aosta, is one of the wildest and most fascinating locations in the Valpelline, dominated by the Grand Combin massif and the Place-Moulin dam. Collontrek is part of the Tour du Cervin and Tour des Grands Barrages circuits, and is one of the sporting events that best illustrates the deep bond between Italy and Switzerland in this corner of the Alps.
Collontrek — edition 2026
The 2026 edition of Collontrek is scheduled for September 4th and 5th, with a start at 6:00 AM from the Place-Moulin dam (1989 m) in Bionaz. The approximately 22 km course with 1250 m positive elevation gain (1230 m descent) crosses alpine paths, glacier, and mule tracks, finishing in Arolla (2006 m), Switzerland, after crossing the Col Collon at 3080 metres.
Programme Collontrek 2026
September 4-5, 2026
- 06:00 AM — Start from the Place-Moulin dam (1989 m), Bionaz
- Crossing of the Col Collon (3080 m) with passage over the glacier (Haut Glacier d'Arolla)
- Finish in Arolla (2006 m), Switzerland, approximately by 3:00 PM
- Course: ~22 km, 1250 m D+ / 1230 m D- (alpine paths 48%, glacier 16%, mule tracks 30%, road 2%) — SAC T4 classification
Part of the Tour du Cervin and Tour des Grands Barrages circuits. Registration and rules at collontrek.com.
Highlights Collontrek 2026
Prices Collontrek 2026
Practical information — Collontrek
Getting There
By car: from Aosta, drive up the Valpelline to Bionaz and the Place-Moulin dam, the starting point of the race. The finish is in Arolla, Switzerland.
Registration and Information
Registration and rules are available on the official website collontrek.com. Contacts: +41 27 283 40 00, [email protected]. Given the high-altitude nature of the course, adequate preparation and equipment are required.
Festival-goer photos
No photos yet. Share yours!
Share your photos
5 photos max, 5 MB per photo (JPG, PNG, WebP)
Noticed an error or missing information?
Help us keep this listing up to date. Every proposal is verified by our team before publication.
Festival-goer reviews
No rating yet — be the first!
No comments yet. Be the first!
Were you there?
Share your experience with the community.
Where does it take place — Collontrek
Diga di Place-Moulin (1989 m)
Diga di Place-Moulin, 11010 Bionaz