Trail Running Calendar Wales 2026-2027

Run 24 hours along Offa's Dyke National Trail from Prestatyn on May 9 2026. Solo and team entries offer a continuous coastal to countryside challenge with staffed checkpoints and a finishers medal to mark your achievement.

A 10 hour loop race on Mynydd Troed with steep climbs, technical descents and marked clip stations. Open to solo runners, pairs and teams of four, with mandatory kit and a strict 10 hour cutoff.

A Welsh trail event offering a 100-mile loop from Abergavenny and a 100 km route from Talgarth to Abergavenny, both following Offa’s Dyke, Cambrian Way and Beacons Way across mountain terrain.

A 115 km multi-discipline race from Abersoch beach to Snowdon and back, featuring a 1.5 km sea swim, two 49.5 km bike legs and a 12 km mountain run. The 2026 edition reached its 400 place capacity.

A set of off-road fell races in the Preseli hills featuring a 10.8-mile Bach and an approx 24-mile Beast with substantial ascent, marked and partly supported courses, category prizes, and WFRA safety and kit requirements.

A 12.8 km fell race near Llanberis with 915 m of climb, a ridge route over Moel Eilio, Foel Gron, Foel Goch and Moel Cynghorion, and navigational challenges in poor visibility. Registration is at The Heights Hotel.

A recce of the Paddy Buckley leg from Nantmoor to Beddgelert Forest over the Hebogs, covering 15 km with 1,580 m ascent in Snowdonia. Small guided groups led by Mountain Leader qualified runners, age 18 plus, entry fee £65.

Trail running at Margam Country Park on 10 May 2026 offering 5 km, 10 km and half marathon routes. The event is canicross friendly, uses live chip timing and includes a finisher medal and refreshments.

Experience an off road running event in the Clwydian Range featuring marathon, half marathon, and 10k distances. Take on hilly trails with sustainable local support and options for canicross runners.

An off-road 10K along the Llangollen Canal on 10 May 2026, based at Llangollen Leisure Centre. The event also includes a kids 1 mile; entries include a Bespoke finisher medal and have specific age, refund and image use rules.

A short fell race from the Railway Car Park at Rhyd Ddu covering 4 km with 410 m ascent. The route is partially marked and navigational skills are required.

Ultra-Trail Snowdonia by UTMB is a UTMB World Series trail running event in Llanberis, North Wales from 15 to 17 May 2026. It offers multiple mountain race distances from 25 km to 163 km with significant elevation gain.

A mountain trail marathon of about 26.2 miles and a separate 10 mile race start and finish at Parkwood Dolygaer in the Brecon Beacons. The marathon has three checkpoints and a six hour cutoff at 20.5 miles; compulsory kit is required for bo..

A community Pretty Muddy 5k obstacle course in Singleton Park on 16 May 2026, with mixed grass and path terrain, staggered wave starts and accessibility provisions including sunflower wristbands and BSL stage content.

A mountain race on Cader Idris of 16.9 km with 915 m of ascent, run on a partly marked route that requires navigation and experience. Entries open online with a limit on competitors and chip timing in place.

A point to point race of approximately 5 miles along river paths and a canal towpath on 17 May 2026, organised by Maldwyn Harriers. Entry fees vary by category and entries may be taken on the day.

A midweek fell race in the North Wales series over approximately 8 km with 470 m of climb, mandatory checkpoints and a steep uphill finish; pre-registration is required with additional entry notes and junior categories listed.

A multi terrain 10 km run on 22 May 2026 through Parc Dinefwr, Parc Penlan and Parc le Conquet with a 90 minute cut off; entry includes cheese and wine for finishers and an optional event T shirt.

A 26.2 mile trail marathon near Bridgend with mixed terrain, quarry and forestry sections, and a route past the Bedford ironworks. Places are limited to 60 runners and the course is marked with GPX and five feed stations.

A long-standing 16 mile mixed surface hill race in Lampeter that follows the Teifi valley and crosses the Sarn Helen roman road. It offers individual entries and three person relays and includes a prize for beating the course record.