Trail Running Calendar Wales 2025-2026

The Scare Bear Run in Aberdare, hosted by Saturn Running, is a unique 7-hour time challenge event set in the scenic Dare Valley Country Park. Participants can choose their distance, starting from a minimum of 3km, with laps of approximately 4.37 miles (7km) on well-maintained paths offering beautifu..

The Brenig Way 50K Trail Race is a challenging ultramarathon that covers 50 kilometers through remote upland scenery in Wales. Starting in Corwen, participants follow a marked footpath along country lanes, forest tracks, and riverside paths, crossing notable landmarks such as Clocaenog Forest and Ll..

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 changes. The event offers solo races of 8-hour (33 miles) and..

The Giddy Horse Half Marathon, Trail, & Steeplechase Obstacle Course Races take place at Chepstow Racecourse in the UK. The event features a variety of distances including a half marathon, 8-mile and 4-mile trail runs, as well as 4-mile and 8-mile steeplechase obstacle course races. The trail races..

Black Beacon Mountain Races are a series of mountain trail events crossing the Black Mountains and Bannau Brycheiniog (Brecon Beacons) National Parks in South Wales. Four distances invite a range of abilities: Black Beacon 100 (100 miles with ascent, an out-and-back from Hay-on-Wye to Pontneddfechan..

OTT Ultra Marathon is a 30-mile trail race through the Brecon Beacons in South Wales. Based around Merthyr Tydfil, the course begins near Cyfarthfa Castle and follows the Taff Trail before diverging onto riverside trails toward the Beacons Reservoir. The route climbs to Pen y Fan, the region’s highe..

Twmbarlwm Terror is a 7-mile multi-terrain race organised by Fairwater Runners Cwmbran in Risca, near Newport, South Wales. The route combines footpaths, open fields, country lanes and woodland from Risca Leisure Centre to the Twmbarlwm peak and back, with around 1,000 feet of total ascent. Now in i..

Endurancelife Gower is a coastal trail-running event on the Gower Peninsula, centered on Oxwich Bay in Wales. It offers four distances: 10K (6.8 miles), Half Marathon (14.3 miles), Marathon (27.4 miles), and Ultra (34.2 miles). The route traverses strenuous terrain—cliff tops, downs, woodlands, sand..

The Beacons Ultra, Marathon and Half is a multi-distance running event held around Talybont-on-Usk, in the Brecon Beacons, Powys, Wales, with Henderson Hall as the base. It offers three distances: a 49‑mile Ultra, a 26‑mile Marathon, and a 13‑mile Half Marathon, all on a mixed trail/mountain/canal/r..

Set in Newborough Forest and along Traeth Llanddwyn on Anglesey, the Anglesey Trail Half Marathon & 10k offers forest and coastal routes through trees, beaches, and winding woodland trails. Runners tackle single-track forest trails with views across the Llyn Peninsula and Snowdonia, with sections th..

The Margam Trail Races take place at Margam Country Park and Forest, offering runners a scenic and well-marked trail running experience. The event features three distances: a half marathon (21.1 km with 750m elevation), a 10k (10.2 km with 420m elevation), and a 5k (5.1 km with 140m elevation). The..

The Slate Trail Ultra, organized by APEX Running, is a challenging trail running event set in the scenic Snowdonia region of Wales. It offers two main distances: a 145km (90mi) ultra with 3,900m+ elevation gain and an 88km (55mi) Ultra Tour of the Quarries with 2,700m+ elevation gain. The course fol..

Trails & Tarmac 12hr Backyard Ultra takes place in Crickhowell, Powys, near the Black Mountains. The race uses a 4.2-mile loop run 50/50 on trail and tarmac, with one gradual climb and a short steep section to keep the pace fast. The format runs up to 12 hours: the first 11 laps must be completed wi..

Dawn Two Dusk (Day Light Robery) is a 12-hour endurance event held at Bridgend Miniature Railway in the Bridgend area of South Wales. Participants tackle three 10-mile routes and attempt to run as many loops as possible within the 12-hour window. The mixed-terrain course includes hills, short road s..

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 ideal experience for both seasoned athletes and newcomers...

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 accommodates runners of all abilities. Set in a scenic natural env..

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 village below. The course winds through beautiful forested..

The Smurf Run in Aberdare, Wales, is a unique 7-hour time challenge event hosted by Saturn Running at the scenic Dare Valley Country Park. Participants can choose their distance, starting from a minimum of 3km, with laps of approximately 7km (4.37 miles) on well-maintained footpaths offering beautif..

The Loggerheads Half Marathon, held at Loggerheads Country Park, is a scenic and inclusive trail running event featuring a 7km loop completed three times. The course offers varied terrain and gradients, with each lap passing the start/finish area where runners can access feed stations and support. P..

Run The Trails Afan Forest, part of the Aspire X Events Run The Trails Series, takes place at Bryn Bettws Lodge in Pontrhydyfen, Port Talbot. Runners can choose between 5km and 10km routes, with hand-picked trails designed to suit both first-timers and more experienced athletes seeking a challenge a..