Fiesch, Switzerland · Trail
Official site ↗Swiss Alps 100
A high, steep Swiss mountain race in Fiesch, Valais: a 160 km with 10,150 m of climbing and a 100 km, both Western States qualifiers, run each August.
Distances
160 Km
- Distance
- 160 km (99 mi)
- Vert gain
- 10,150 m (33,300 ft)
- Cutoff
- 50 hr
WSER 2027 qualifier (sub-50:00)
100 Km
- Distance
- 100 km (62 mi)
- Vert gain
- 6,250 m (20,500 ft)
- Cutoff
- 27 hr
WSER 2027 qualifier (sub-25:00)
| Distance | Vert gain | Cutoff | Notes |
|---|---|---|---|
| 160 km (99 mi) | 10,150 m (33,300 ft) | 50 hr | WSER 2027 qualifier (sub-50:00) |
| 100 km (62 mi) | 6,250 m (20,500 ft) | 27 hr | WSER 2027 qualifier (sub-25:00) |
Race-day weather
The forecast for Fiesch, Switzerland on August 7, 2026: high 79°F (26°C), low 62°F (17°C), 58% chance of precipitation.
Forecast via Open-Meteo, refreshed hourly.
About
Swiss Alps 100 runs out of Fiesch in the Valais, on high trails above the Aletsch Glacier region. Its flagship 160K climbs about 10,150 metres, and a 100K climbs about 6,250; both are steep, high, and technical. The weekend also holds a 50K, a Vertical, and a kids' run.
The 160K starts at 7:30 a.m. Friday and holds a 50-hour cutoff; the 100K starts at 5:30 p.m. Friday with a 27-hour cutoff. Both count as Western States 100 qualifiers, the 160K under 50 hours and the 100K under 25.
Course
High trails above the Aletsch region out of Fiesch. The 160K climbs about 10,150 metres and starts at 7:30 a.m. Friday with a 50-hour cutoff; the 100K climbs about 6,250 metres and starts at 5:30 p.m. Friday with a 27-hour cutoff.
How to register
Registration is on the Swiss Alps 100 site. The weekend also holds a 50K, a Vertical, and a kids' run.