Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 187 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
An evening trail run in Llandegla Forest on 6 November 2026 covering 6.4 km with 229 m climb; partially marked course, compulsory headtorch and kit, £5 entry on the day.
Trail races at Oxwich Bay on 7 Nov 2026 across 10K, half, marathon and ultra distances along coastal cliffs, dunes and beaches.
Three trail races around Talybont-on-Usk in the Brecon Beacons on 7 November 2026, from a 49-mile ultra to a 13-mile half, with substantial elevation and ITRA/UTMB indexing.
A medium length fell race from Llanfachreth with a 6 mile route and 579 m ascent, forming the first event in the Meirionnydd Winter Race Series.
A 30 mile trail ultra through the Brecon Beacons from Merthyr Tydfil, with technical terrain, four checkpoints and a six hour cut-off at checkpoint three.
A coast to coast ultramarathon on 7 November 2026 near LL53 6NL offering a solo 37.5 mile route and a team of four option with included race apparel.
A mountain fell race around Cilcain of 14.2 km with 910 m ascent, Category A with mandatory kit, limited Waterworks parking, and a staffed kit dump.
Multi terrain races at Margam Country Park on 8 Nov 2026 featuring individual and CaniX 5K, 10K and 20K events plus a 12 x 5K Countdown Ultra.
Cross country meeting at Llandaff Fields in Cardiff on 8 November 2026, with age-group, school and senior races and World Athletics Silver Label status.
Long distance trail races along the Snowdonia Slate Trail offering 147 km with 3,900 m ascent or 80 km with 2,300 m ascent and strict mandatory kit checks.
Fully marked trail races at Margam Park including a half marathon and a 10k, running through woodland, parkland and the deer park with coastal views; entries include parking, timing, a medal and download photos.
Trail Half Marathon Wales at Margam Country Park on 14 November 2026 features fully marked forest races over 21.1 km and 10.2 km with checkpoints and included parking.
A guided 55km route on Anglesey taking in three of the island's highest tops, with over 2000 m ascent, checkpoint support and a wooden finishers medal.
A 16.1 km Penmaenmawr fell race with 594 m ascent, partially marked terrain and required navigational skills; entry is online only and minimum age is over 18.
Timed lap event in Cardiff Bay offering flexible start times and distances from one 5.3 km lap up to multi lap ultra within a 7 hour limit.
The Smurf Run at Dare Valley Country Park is a seven hour Time Challenge on well maintained park paths, with distances from 3 km up to 50 km. Finishers receive themed medals, distance pins and a goody bag with vegan options.
A trail half marathon at Loggerheads Country Park with solo and teams of three relay options, varied terrain and feed stations each 7 km lap.
A 5.7 km fell race in Llanfoist with 485 m ascent, limited to 120 runners; entry fees £6/£4 and no entries on the day.
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.