Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 177 exciting trail runs across the region. Find your next trail run in Wales below and join the trail community at these great events!
September 2026
Coastal ultra events on Anglesey offering a 130-mile clockwise island circumnavigation and a separate ~47-mile coastal route along the Isle of Anglesey Coastal Path.
A multi-terrain off-road race of about 4 miles in Shotton on 4 September 2026, with pre-entry fees (£10, £8 affiliated), prize categories by age, a minimum age of 17, and a 200-person entry limit.
A new 15 mile trail event in September 2026 on the Rhymney Valley Ridgeway Walk, with 2,267 ft of ascent, mostly off-road terrain, one fully stocked checkpoint and organised entry support from Rudry to Parc Penalta.
A 102 mile self navigation ultra across Snowdonia with 11 checkpoints, live GPS tracking, mandatory mountain kit and a 42 hour cutoff.
Trail running event in Snowdonia from Barmouth to Cadair Idris with multiple marked routes, chip timing, photos and an event village with refreshments.
Waun Fach on 6 September 2026: a 11.2 km, 610 m ascent fell race on a classic horseshoe route with marshals, limited to 50 entries; fee covers parking and light refreshments.
A 14.5 km fell race from The Gladstone near Penmaenmawr with 855 m ascent on partially waymarked upland terrain; competent navigation and mountain skills are required.
A six day 380 km multi stage ultra across the spine of Wales from Conwy Castle to Cardiff Castle with mandatory maps, trackers and overnight camps.
A 24 hour loop race at OnePlanet Adventure in Llandegla where individuals or two person teams complete as many 3 mile laps as possible on forest trails.
Guided mountain run across the 15 Welsh 3,000 ft peaks in Snowdonia, about 30 miles with 4,000 m ascent, guided support and food stations; entry from age 18.
Timed lap event at Parc Taf Bargoed on 12 September 2026 offering distances from 5 km up to ultra with a 7 hour time limit.
An 8 km mountain race over the three peaks of the Eifl near Pwllheli with about 490 m of ascent. Main race for over 16s with entry on the day £10; junior races are held with a £3 entry.
A partly marked fell race from the Raven Inn, covering 11.25 km with 445 m ascent. Day-entry only at £5, minimum age over 18, and participants should allow about 15 minutes to walk to the start.
A long, non-commercial fell race in the Black Mountains with a 27.4 km route and 1586 m of ascent. The event uses five checkpoints, requires full navigational kit, and operates on open access land with no on-course water provided.
A sunset trail half marathon across the Clwydian Hills to Moel Famau, about 21 km with 750 m ascent, staggered starts and Canicross entries.
A 100 mile ultramarathon along the Cambrian Way from Rhayader, Wales, on 12 September 2026, with live GPS tracking, on-route support and a finisher medal.
A 12km canitrail and trail run at Halo Ogmore Valley Life Centre in aid of PAPYRUS on 13 September 2026, entry £26, dogs welcome.
Coastal trail races in Abersoch on the Llŷn Peninsula offering 2K, 10K and 20K routes that start and finish on the beach with medals, drink stations and chip timing.
A 12 hour Backyard Ultra on a 4.2 mile loop near Crickhowell in the Black Mountains. The final lap is run in reverse as a sprint to decide male and female winners; medals are awarded for 32 miles or more.