Trail Running Calendar Wales 2025-2026

The Giddy Horse Backyard 2025 is a running event held at Chepstow Racecourse, UK, featuring races around Piercefield Park. The course is a 4.167-mile loop combining woodland, parkland, and tarmac trails, mostly flat with gentle elevation ch..

Event overview The Giddy Horse Half Marathon, Trail, & Steeplechase Obstacle Course Races take place on Saturday 25th October 2025 at Chepstow Racecourse, Saint Lawrence Road, Chepstow, UK, NP16 6BE. Tickets for the event are currently..

Challenge the Bannau Brycheiniog and Black Mountains around Hay on Wye from 31 Oct to 2 Nov 2025 with races from 21 miles to a 100 mile epic. Technical mountain trails require navigation skills and mandatory kit for a true wild trail test.

Take on a 30 mile trail ultramarathon through the Brecon Beacons, starting and finishing in Merthyr Tydfil on 1 November 2025. Expect rugged trails, a climb to Pen y Fan summit and supportive checkpoints on a testing scenic course.

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 a scenic half marathon or 10k through Newborough Forest onto Llanddwyn Island, with sweeping views of the Llyn Peninsula and Snowdonia. Enjoy an event village, chip timing and marshals while supporting Alder Hey Children's Charity.

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.

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 the dramatic Snowdonia Slate Trail from Porth Penrhyn, Bangor in a scenic ultra weekend on 15 and 16 November 2025. Choose a challenging 80 to 88 km tour or the full 145 to 147 km Slate Trail for an unforgettable mountain adventure.

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 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..

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..

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..