Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 193 exciting trail runs across the region. Find your next trail run in Wales below and join the trail community at these great events!
November 2026
Two trail distances on 28 November 2026 around Machen, featuring wooded single track, ridgeway exposure and steep climbs. The half course is fully marked while the marathon requires self navigation with marshals at key points.
Lap-based timed event at Parc Taf Bargoed on 28 November 2026 offering flexible distances from a 5.3 km lap up to ultra, with medal and no medal entry options.
A fully marked 10km night trail run near Narberth, Pembrokeshire with light installations, fancy dress prizes, mandatory torch and phone, marshals and mobile first aid.
Final race of the 2026 RTT Series in Afan Forest offering 5 km and 10 km trail routes with chip timing, medals and water stations at Bryn Bettws Lodge.
A club organised race at Blaenwern Holiday Centre in Llanybydder on 29 November 2026 covering 6.5 miles on mixed surfaces; junior and senior categories are included and past results are archived online.
Timed lap event at Rhydycar, Merthyr Tydfil on 29 November 2026 with distances from 5 km to ultra on a certified tarmac course.
A guided 10 km trail run from the Sychnant Pass summit featuring runnable terrain, regular stops and a steady group pace on an upland route.
December 2026
A 6.4 km forest race at Llandegla with 229 m climb, compulsory headtorch and safety kit, and entry on the day only for a £5 fee.
Winter trail races at Alyn Waters offering fully marked 5k and 10k courses with chip timing, medals for finishers and a free 1km children's dash.
Trail races from Prestatyn seafront along Offa's Dyke offering half, full and a 55.5 km ultra finishing at Horseshoe Pass.
Military themed timed run at Barry Sidings Country Park on 6 December 2026 with lap based distances, medals, aid station and a seven hour limit.
An 8 km trail in Llangollen on 11 December 2026 with 244 m climb; the course is partially marked and a good head torch is essential.
Winter trail races in South Wales with three fully marked courses through Afan Forest and the Rhigos, finishing at Dare Valley Country Park.
A 24 hour out and back trail challenge from Llanbenwch Caravan Park with 98 km, 70 km and 50 km options for solo entrants or teams.
A just over 6 mile December dune race at Merthyr Mawr with a midrace mulled wine and mince pie stop and organised charity fundraising.
A festive charity trail run in Llangennith offering 5 km and 10 km routes, with proceeds to Morgans Army and an entry fee of £10.
A festive 2.5 km or 5.0 km run at Dare Valley Country Park with themed medals, a visit from Santa, and basic venue facilities.
A festive trail race at Bwlch Penbarras with a mystery course of 6 to 12 kilometres, a canicross category, marshals and a mince pie at the finish.
Skirrid Xmas Hill Race is a 5.7 km fell race with 450 m ascent near Llanvihangel Crucorny on 19 December 2026; entry £10, no entries on the day.
Two festive runs of 2.5 km and 5 km at Dare Valley Country Park with medals, goody bags, refreshments and free parking.