Trail ultramarathon · Australia
26–28 November 2026 · Thredbo, New South Wales
Kosci100: Fri, 27 November 2026
Australia's high-country UTMB World Series event, on the Snowy Mountains around Thredbo and Mount Kosciuszko.
2026 dates confirmed
Event and distance dates were checked against the organizer schedule.
Date sourceEntry · Kosci100 · 2026 edition
The organizer listed Kosci100 as full on 30 Sep 2026. A place can only come through the organizer's own transfer or waiting-list rules, if any.
From the organizer's page, checked 30 Sep 2026. TrailSplits does not know whether you have a place; the organizer is the final word.
Ultra-Trail Kosciuszko by UTMB is a trail ultramarathon scheduled for 26–28 November 2026 in Thredbo, New South Wales, Australia. TrailSplits currently includes 4 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: Direct entry for the 26-28 November 2026 edition: UTMB Index priority from 10 March 2026, general entries 12 March 2026; all distances are sold out. KosciMiler eligibility had to be submitted by 15 October 2026. Organizer's page, checked Thursday 1 October 2026.
TrailSplits is a free, independent route & pacing companion — not the official race. Visit the official Ultra-Trail Kosciuszko by UTMB site →
Finishing Kosci100 earns 3 Running Stones (100K category) toward the UTMB World Series Finals lottery. How Running Stones work.
Racing more than once next year? Add Kosci100 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.
Other distances
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 30.8 m climb per km.
Fri, 27 November 2026
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 Kosci100 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 Kosci100 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.
Ultra-Trail Kosciuszko by UTMB 2026 races run 26–28 November 2026 in Thredbo, New South Wales; the Kosci100 is on Fri, 27 November 2026. Check the official race site for registration deadlines and final details.
4 distances (32–161 km). The longest course is 161 km with about 5,131 m of vertical gain — a demanding mountain course.
The KosciMiler course has a 36-hour cut-off, an average of 13.4 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://kosciuszko.utmb.world/.
Load the GPX directly into TrailSplits for surface analysis and terrain intel.