Trail Running Calendar Wales 2025-2026

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..

Take on the MT10, a scenic 10 miles off road trail through Pembrey Country Park and along Cefn Sidan Beach. Expect mixed soil and firm sand, sea breezes and wide open views for a memorable coastal run on 16 November 2025.

Join the Smurf Run at Dare Valley Country Park for a seven hour Time Challenge where you choose how many laps to tackle and soak up scenic country views. Complete a lap to earn a themed medal and enjoy on course refreshments.

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.

Celebrate the season on rugged Black Mountains trails at the Secret Santa Festive Trail Series. Three scenic but technical distances, bespoke medals, mulled wine and full on course support make for a memorable winter run.

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..

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..

Choose from three challenging trail distances through Afan Forest, the Rhigos mountains and Coed Morgannwg Way, featuring climbs, long descents and river crossings. Finish at scenic Dare Valley Country Park on 13 December 2025.

The Night Nobbler is a 10km night trail near Narberth returning to its original woods under the RERUN theme. Dress in upcycled fancy dress for solo or group prizes and bring a head torch and phone for this atmospheric after dark run.

Run the spooky A Nightmare Before Xmas Trail half marathon in Bridgend on 20 December 2025, a festive mixed terrain course with hills, mud and scenic road views. Limited to 50 runners, with an eight mile option, mulled wine and a prize for..

The Moel Famau Festive 'Piece of String' Race is a unique running event held on the last Saturday before Christmas at Bwlch Penbarras. Participants can expect a surprise distance and route, ranging between 6 and 12 kilometers, which will be..

Join the Santa Run Wales at Dare Valley Country Park on 20 December 2025 for a family friendly 3 km on scenic footpaths. Enjoy festive music, fancy dress prizes, mince pies and a themed medal at the finish.

Discover upland trails in the Elan and Claerwen Valleys at this volunteer run walking and running event, with waymarked routes of about 12 or 20 miles. Map reading is needed; entrants receive a map and GPX in advance and funds support local..

The Cardiff Trail 10k is an exciting running event set against the stunning backdrop of Castell Coch. Scheduled for January 18, 2026, this newly introduced race offers participants a unique blend of competition and natural beauty, making it..

Join a guided 12 km trail run from the village of Pwll Glas exploring Eyarth Rocks and Graig Wyllt, with gentle hills and varied terrain. Enjoy planned stops, scenic views and friendly company on this relaxed outdoor adventure.

Take on the epic Tour De Yr Wyddfa with 43.5 km and 2327 m ascent around the mountain on 24 January 2026, or opt for a shorter Llanberis to Pen y Pas half, relay or pair entry. Organized by Eryri Harriers for experienced mountain runners.