Trail ultramarathon · United States
23–25 April 2027 · Auburn, California
100M: Fri, 23 April 2027
A historic Western States country race weekend along the American River canyons with high search demand and classic California ultra terrain.
Entry · 100M · 2027 edition
First come, first served until Sun 18 Apr 2027, 23:59 GMT-7 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.
Canyons Endurance Runs by UTMB is a trail ultramarathon scheduled for 23–25 April 2027 in Auburn, California, United States. 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: Registration for the 2027 edition (22-25 April 2027) is open now, first come until sold out; online registration closes 18 April 2027 and there is 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 Canyons Endurance Runs by UTMB site →
The organizer lists 100M at 161 km and +5,550 m for 2027; the course file mapped here (the organizer's 2026 file) measures 158.7 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 100M earns 4 Running Stones (100M category) toward the UTMB World Series Finals lottery. How Running Stones work.
Racing more than once next year? Add 100M 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 34.5 m climb per km.
Fri, 23 April 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 100M 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 100M 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.
Canyons Endurance Runs by UTMB 2027 races run 23–25 April 2027 in Auburn, California; the 100M is on Fri, 23 April 2027. Check the official race site for registration deadlines and final details.
4 distances (25–161 km). The longest course is 161 km with about 5,550 m of vertical gain — a demanding mountain course.
The 100M course has a 35-hour cut-off, an average of 13.0 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://canyons.utmb.world/.
Load the GPX directly into TrailSplits for surface analysis and terrain intel.