UK Ultra-Trail Races
Written by Catriona Adams. Published 10 August 2026
Organised UK ultra-trail races supply what a Round doesn't: a marked course, aid stations, a start list and a results page. They range from UTMB-branded events to independent 100-milers with decades of history — a different discipline from the self-navigated Rounds, run on purpose-built infrastructure rather than the runner's own planning.
What makes an organised race different from a Round
An organiser marks the route, staffs checkpoints, sets cut-off times, and publishes a finishers' list — none of which exists on a Round. That doesn't make an organised race easier: distance and elevation on UK ultra-trail races often exceed the Rounds, and the terrain is the same British weather and ground. What changes is who carries the logistics. Two UK races — Eryri by UTMB in Snowdonia and Arc of Attrition by UTMB in Cornwall — also carry the UTMB World Series brand, putting them on the same circuit as France's UTMB itself.
Races covered here
- Eryri by UTMB — Snowdonia, Wales — one of two UK races on the UTMB World Series, five distances from 25K to 100M.
- Lakeland 100 — A full loop of the Lake District from Coniston — ~100 miles, ~6,300m of climb, since 2008.
- Dragon's Back Race — Conwy Castle to Cardiff Castle across Wales — ~380km, ~16,400m of climb, 6 stages.
FAQ
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