Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 163 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
Multi terrain races and a 12x5K Countdown Ultra take place at Margam Country Park on 8 November 2026, with separate individual and canicross races.
A Snowdonia trail event in November 2026 with a 147 km and an 80 km route, significant elevation gain, aid stations, drop bags and set cut off times.
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 fell race near Capelulo with 594 m of climbing, partial route marking and navigational requirements; online entry only, minimum age 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.
Experience a 10 mile multi terrain trail run through the scenic woods of Pembrey Country Park and across the firm sands of Cefn Sidan Beach.
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 short 5.7 km fell race at Blorenge near Abergavenny with steep, technical ascent and descent and basic navigation required.
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.
Timed multi-lap event at Parc Taf Bargoed offering distances from a single 5.3 km lap up to an ultra, with bespoke medals and a no medal entry option.
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.
A lap based road event at Rhydycar, Merthyr Tydfil, on a 5.3 km AUKCM certified tarmac circuit along the Taff Trail. Runners choose how many laps to complete within a seven hour limit and can opt for a no medal entry.
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.
Marked and marshalled winter trail races at Alyn Waters with 5 km and 10 km options, chip timing, medals, and a free 1 km children's dash.