Trail ultramarathon · Switzerland
6–8 August 2027 · Fiesch, Valais
50K: Sat, 7 August 2027
A demanding Oberwallis ultra weekend around Fiesch, Aletsch Glacier viewpoints, suspension bridges, and rugged alpine climbs.
2027 dates confirmed
Event and distance dates were checked against the organizer schedule.
The mapped GPX is carried forward from 2026 until the new course is verified. Use it for course research, then re-check before race day.
Date sourceEntry · 50K · 2027 edition
First come, first served until places run out. Open on the organizer's page on 30 Sep 2026, which does not say how many places are left.
From the organizer's page, checked 30 Sep 2026. TrailSplits does not know whether you have a place; the organizer is the final word.
Swiss Alps 100 is a trail ultramarathon scheduled for 6–8 August 2027 in Fiesch, Valais, Switzerland. TrailSplits currently includes 3 mapped courses for this event, with course maps, elevation profiles, weather context, and pacing tools for the uploaded GPX data.
How to get a place: Registration for the 6-8 August 2027 edition is open; the 160K sold out on 21 September 2026 while the 100K and 50K remain open. No lottery. Organizer's page, checked Wednesday 30 September 2026.
TrailSplits is a free, independent route & pacing companion — not the official race. Visit the official Swiss Alps 100 site →
Racing more than once next year? Add 50K to a season and see whether your races work together.
Inspect the official course track on a topographic map, through its elevation profile, or in 3D.
› running direction two lines: out and back on the same path kilometres
Selected distance
Vert-focused blueprint with route-finder links into the Planner.
Prepare and return
Keep this course, its training plan, calendar and future course updates together in your private My Races page. Saving does not publish your workouts, pace or progress.
Race route lab
Open the official course in Planner, then choose a nearby start point to build a shorter loop that matches the course demand. This course averages about 64.2 m climb per km.
Sat, 7 August 2027
Send to your watch
Get the official course as a clean GPX or a Garmin TCX course, with step-by-step instructions to load it onto a Garmin, COROS, Suunto, Wahoo, or Komoot — free, no account needed.
Compare your training
See how faithfully your rehearsal route matches the real race. The official course for 50K loads as Route A — upload your training route to compare distance, elevation gain, estimated time, and how much of the course you actually cover.
Course analysis
See the 50K course broken into its major climbs and descents in order — length, gain, average grade, and steepness — so you know where the crux is and how to pace and fuel it.
Race-week reminders
A free browser notification in the final week — the course crux, the weather window, and loading the GPX onto your watch. No app, no email, no account.
Swiss Alps 100 2027 races run 6–8 August 2027 in Fiesch, Valais; the 50K is on Sat, 7 August 2027. Check the official race site for registration deadlines and final details.
3 distances (50–160 km). The longest course is 160 km with about 10,150 m of vertical gain — a demanding mountain course.
The 160K course has a 50-hour cut-off, an average of 18.8 min/km to finish in time. TrailSplits' cut-off pacer shows the buffer at each aid station.
Yes. TrailSplits gives you the course map, an interactive elevation profile, a 3D flyover and a downloadable GPX for every mapped distance — free and with no sign-up.
Each distance has a free, course-specific 16-week training plan built around its distance, vertical gain and cut-offs, plus a pace and cut-off calculator.
No. TrailSplits is a free, independent route and pacing companion. For registration and official rules, visit https://www.swissalps100.com/.
Load the GPX directly into TrailSplits for surface analysis and terrain intel.
Install TrailSplits — a free app you add straight from your browser — and download the 50K course to your phone. Explore the route and elevation offline before race day, then follow it with no signal on the day. No app store, no account, no subscription.