Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 170 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
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 fell race on 12 September 2026 around the three peaks of the Eifl with 490 m of ascent, junior races and entry on the day.
A race of 11.25 km with 445 m ascent around the Raven Inn in Llanarmon yn Ial on 12 September 2026; entry on the day £5, minimum age over 18.
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.
Multi-lap triathlon in Llanberis with lake swims in Llyn Padarn, multiple 28 mile bike laps and a mountain run up and down Yr Wyddfa.
AL graded fell race from Llanberis with full 28 km 2600 m and half 14 km 1350 m routes over Elidir Fawr, Glyder Fawr and Snowdon.
A scenic, hilly trail half marathon in the Cothi valley near Pumsaint, offering a 13 mile race, a 6.5 mile alternative and a kids race, based at Pumsaint Village Hall on 20 September 2026.
A five mile mixed-terrain race through Porthkerry Country Park with varied surfaces, two climbs and inclusion in the South Wales Regional Trail Championship.
A multi day 286 km mountain race across Wales with solo and team entries, five indoor checkpoints and a 108 hours time limit.
Three coastal trail races on 26 September 2026 around the Gower Peninsula offer routes of 50, 34 and 23 miles along cliffs, bays and coastal paths. The event is self navigated with checkpoints, GPS tracking and coach transfers to starts.
An 11.6 km fell race in Glyn Ceiriog with 425 m climb on 26 September 2026; on-the-day entry £6, minimum age 18, with refreshments and showers at the Canolfan Ceiriog Centre.
A fell running race in Caerphilly on 26 September 2026 featuring a 9.5 km course with 336 m of climb, partially marked and with a short walk from parking to the start.