Trail ultramarathon · Austria
Expected 5–7 August 2027 · Fieberbrunn, Tirol
Marathon Trail 51K: Expected Sat, 7 August 2027
A Kitzbuhel Alps trail weekend based in Fieberbrunn with steep alpine climbs, high ridges, and multiple UTMB World Series distances.
2027 date is estimated
The organizer has not announced the next date yet. This estimate keeps planning useful without presenting it as official.
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 · Marathon Trail 51K · 2027 edition
First come, first served until Wed 21 Jul 2027, 00:00 CEST or until places run out. Open on the organizer's page on 30 Sep 2026, which does not say how many places are left.
Subscribe to these entry dates (updates when the organizer's dates change and we recheck them) · Download .ics. Separate from any training calendar; remove it any time in your calendar app.
From the organizer's page, checked 30 Sep 2026. TrailSplits does not know whether you have a place; the organizer is the final word.
KAT100 by UTMB is a trail ultramarathon expected around 5–7 August 2027 in Fieberbrunn, Tirol, Austria. TrailSplits currently includes 5 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: General registration for the 5-7 August 2027 edition is open: UTMB Index holders from 22 September 2026 (48 hours), then everyone until 21 July 2027 or sell-out; no waiting list. Organizer's page, checked Wednesday 30 September 2026.
TrailSplits is a free, independent route & pacing companion — not the official race. Visit the official KAT100 by UTMB site →
The organizer lists Marathon Trail 51K at 52 km and +3,100 m for 2027; the course file mapped here (the organizer's 2026 file) measures 49 km. Small differences come from how each figure was measured; plans and pacing here use the mapped file. Organizer's race list, checked Wednesday 30 September 2026.
Finishing Marathon Trail 51K earns 2 Running Stones (50K category) toward the UTMB World Series Finals lottery. How Running Stones work.
Racing more than once next year? Add Marathon Trail 51K 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 63.7 m climb per km.
Expected 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 Marathon Trail 51K 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 Marathon Trail 51K 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.
KAT100 by UTMB 2027 races are expected to run 5–7 August 2027 in Fieberbrunn, Tirol; the Marathon Trail 51K is expected on Sat, 7 August 2027. Check the official race site for registration deadlines and final details.
5 distances (8–169 km). The longest course is 169 km with about 9,000 m of vertical gain — a demanding mountain course.
The 100 Miles course has a 45-hour cut-off, an average of 16.0 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://kat.utmb.world/.
Load the GPX directly into TrailSplits for surface analysis and terrain intel.