A WS100-qualifying night loop through the Swiss Alps' highest terrain
Other trail races within 77 miles
A 100-kilometer alpine loop with 6,250 meters of elevation gain, starting Friday evening and running through the night into Saturday. Runners cross two iconic suspension bridges — the 160m Aspi-Titter and 280m Mühlebach-Fürgangen — and traverse ridgelines above the UNESCO-listed Aletsch Glacier with 10 fully stocked aid stations. Finishing in 22 hours or less earns an official Western States 100 qualifier.
Experienced ultrarunners
Fiesch, VS, SwitzerlandAugust 07, 2026
| Location | km | Elevation |
|---|---|---|
Start Fiesch Start | 0.0 | 0 m |
Kühboden Aid Station | 7.0 | 2,218 m |
Gletscherstube Aid Station | 15.6 | 2,364 m |
Bellwald Aid Station | 24.1 | 1,579 m |
Reckingen Aid Station | 37.7 | 1,356 m |
Blitzingen Aid Station | 43.4 | 1,254 m |
Chäserstatt Aid Station | 51.2 | 1,770 m |
Binn Aid Station | 64.9 | 1,445 m |
Breithorn Aid Station | 73.4 | 2,427 m |
Grengiols Aid Station | 84.6 | 1,086 m |
Mühlebach Aid Station | 92.9 | 1,200 m |
Finish Fiesch Finish | 100.8 | 1,067 m |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Significant time above 2,000m; exposed sections up to 2,500m
Night temperatures above treeline can drop near freezing in August
Alpine afternoon thunderstorms common on exposed ridgelines
No recommended gear specified
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