Trail Running Calendar Wales 2025-2026

Black Beacon runs around Hay on Wye from 31 Oct to 2 Nov 2025, taking runners across the Brecon Beacons and Black Mountains. Choose from epic 100 mile to scenic 21 mile courses with checkpoint support and mountain terrain.

OTT Ultra 2025 is a rugged 30 mile trail ultra in Merthyr Tydfil, taking runners over Pen y Fan and along the Taff Trail. Expect big climbs, reservoir views and timed checkpoints on a challenging scenic course with limited entry.

Twmbarlwm Terror is a rugged 7 mile multi terrain race from Risca to the Twmbarlwm peak and back, featuring about 1000 ft of climbing and challenging underfoot conditions. Take on the summit and enjoy complimentary tea, coffee and cake afte..

Run the rugged foothills of the Brecon Beacons on 8 November 2025 with the Beacons Ultra, Marathon and Half in Talybont on Usk. Choose from 49 mile ultra, 26 mile marathon or 13 mile half on scenic trail, mountain and canal terrain.

Run the stunning Gower coastline at Oxwich Bay on 8 Nov 2025 with routes across cliff tops, dunes, woodland and beaches. Options from 10K to Ultra suit every level while full marking and electronic timing keep the focus on the views and the..

Run through Newborough Forest and across Llanddwyn Island on scenic single track trails with views of the Llyn Peninsula and Snowdonia. Choose the 10K or half marathon and enjoy an event village while supporting Alder Hey Children's Charity..

Test your limits at Trails and Tarmac 12 hour Backyard Ultra in Crickhowell, featuring a scenic 4.2 mile loop of trail and tarmac completed each hour. Stay for the final sprint to claim the trophy or earn medals for every loop and 32 miles.

Tackle Snowdonia's rugged Slate Trail with APEX Running in Bangor on 15 and 16 November 2025. Choose a challenging 147 km ultra or a tough 80 km option, both with scenic quarry terrain and full race support.

Run forest trails at Margam Country Park on 15 November 2025, choosing from 21 km, 10 km or 5 km routes. Fully marked courses with checkpoints and GPS files; entries include parking, timing, a medal and free photos.

The Cardiff Trail Half Marathon is an exciting running event set against the stunning backdrop of Castell Coch. Scheduled for November 16, 2025, this newly introduced race offers a unique blend of competition and scenic beauty, making it an..

The Guided Trail Run in Dolwyddelan offers participants a scenic 10km route beginning in the charming village. The run features a leisurely start along the river, followed by a climb to Ty Mawr, where runners can enjoy stunning views of the..

The MT10 (Multi-Terrain 10) is a 10-mile (16 km) off-road trail run held at Pembrey Country Park and along Cefn Sidan Beach in Carmarthenshire. The course features a mix of soil and firm sand surfaces, providing a varied terrain that accomm..

Event overview The Smurf Run is organised by Saturn Too Limited, a franchise partner of Saturn Running, and is scheduled for 22/11/2025 at Dare Valley Country Park, Aberdare, CF44 7PS. The event is run as a 7 hour Time Challenge that allows..

Take on the Loggerheads Half Marathon at Loggerheads Country Park, three laps of a scenic 7 km loop with varied terrain and on course support. Solo runners or teams of three can enjoy a challenging course and a finishers medal.

Explore Afan Forest on hand picked trails with 5K and 10K options at the RTT Afan Forest run. Fully marked and marshalled courses, chip timing and a finisher medal make this a rewarding, well organised trail day for all abilities.

The Alyn Waters Winter Trails offer 5k and 10k fully marked and marshalled trail running courses set in the scenic Alyn Waters country park. Designed for all abilities, the event encourages participants to race or enjoy a leisurely run with..

Take on the Secret Santa trail series on 6 December in Cwmdu, Black Mountains with a festive half marathon and shorter trail options. Tackle technical rocky and boggy single track trails with full support and handcrafted slate trophies.

Sea 2 Summit Offa's Dyke is a scenic yet tough trail race from Prestatyn along the Offa's Dyke National Trail, offering Half Marathon, Full Marathon and a 33 mile Ultra. Electronically timed with a finisher medal, it promises big views and..

Run the Celtic Trail Races around Dare Valley Country Park, with forest trails, sharp climbs, river crossings and sweeping Brecon Beacons views. Choose from 34, 26 or 13 mile routes and finish back at Dare Valley.

Join A Nightmare Before Xmas Trail Half Marathon in Bridgend for a festive, spooky run across muddy, technical trails, steep climbs and rewarding views. Only 50 spots with mulled wine, mince pies, a medal and best fancy dress prize.