About This Race
This challenging 54-kilometer ultratrail features technical singletrails through alpine landscape with 4,020 meters of elevation gain. The course includes a highlight summit of Rätschenhorn, offering spectacular panoramic views across the Swiss Alps. Known for its demanding technical sections and alpine character, this is considered one of Switzerland's most spectacular trail running races.
This challenging 54-kilometer ultratrail features technical singletrails through alpine landscape with 4,020 meters of elevation gain. The course includes a highlight summit of Rätschenhorn, offering spectacular panoramic views across the Swiss Alps. Known for its demanding technical sections and alpine character, this is considered one of Switzerland's most spectacular trail running races.
Elevation Profile
The course gains 2,704m over 54km, with the steepest section between km 81–km 81.
Course Map
Route shown is approximate and for illustration purposes.
Practical Info
ZUR - Zurich Airport
Best For
Notable Features
Set in the spectacular Graubünden Alps around Klosters-Madrisa, this event combines technical singletrails with alpine landscape and unique panoramic views. The race features highlights like the summit of Rätschenhorn, offering breathtaking mountain vistas. Despite its professional organization, the event maintains a familiar, authentic atmosphere that celebrates the pure mountain trail running experience.
Prepare for This Race
GEAR GUIDE
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How to Read an Elevation Profile (And Why It Matters More Than Distance)
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3 min read
GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
RACE GUIDE
The Best Trail Races for Your First Ultra
A thoughtful guide to choosing your first ultra marathon — what to look for in a course, how to evaluate difficulty, and five races worth considering.
FROM THE TRAIL
How to Read an Elevation Profile (And Why It Matters More Than Distance)
Elevation profiles reveal the true character of a trail race. Learn to read the shape of a course and understand what it means for your race day experience.