Trail ultramarathon · United Kingdom
6–11 September 2027 · Conwy Castle → Cardiff
A 6-day stage race along the mountainous spine of Wales. 380 km from Conwy Castle in the north to Cardiff Castle in the south. The ultimate UK mountain challenge.
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 · 383K · 2027 edition
First come, first served until places run out. Open on the organizer's page on 1 Oct 2026, which does not say how many places are left.
From the organizer's page, checked 1 Oct 2026. TrailSplits does not know whether you have a place; the organizer is the final word.
Dragon's Back Race is a trail ultramarathon scheduled for 6–11 September 2027 in Conwy Castle → Cardiff, United Kingdom. TrailSplits currently includes 7 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: Entries for the 2027 Dragon's Back Race (6–11 September 2027) are open, first come, first served, through Race Space: the full six-day race opened at 18:00 on 28 September 2026 with a £400 deposit. No closing date is published. Organizer's page, checked Thursday 1 October 2026.
TrailSplits is a free, independent route & pacing companion — not the official race. Visit the official Dragon's Back Race site →
Racing more than once next year? Add 383K 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.
Dragon's Back Race 383K — 2025 edition. 200 finishers.
Estimated finish-time percentiles, modeled from the 2025 winning (38h 00m) and median (55h 00m) times — a guide, not official splits.
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 44.6 m climb per km.
6–11 September 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 383K 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 383K 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.
Dragon's Back Race 2027 is scheduled for 6–11 September 2027 in Conwy Castle → Cardiff. Check the official race site for registration deadlines and final details.
7 distances (50.2–383.2 km). The longest course is 383.2 km with about 17,083 m of vertical gain — a demanding mountain course.
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.dragonsbackrace.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 383K 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.