Trail Running Calendar Wales 2025-2026

Dusk Till Dawn The Winter Edition is a challenging 12-hour running event held at Bridgend Miniature Railway in South Wales. Participants tackle three distinct 10-mile mixed terrain routes, aiming to complete as many loops as possible from dusk until dawn. The course features varied terrain including..

The Slate Trail Ultra™ is a challenging trail running event held in Snowdonia, Wales, starting from Porth Penrhyn, Bangor. It offers two distances: the full Slate Trail Ultra at 145 km (90 miles) with 3,900m+ elevation gain, and the Ultra Tour of the Quarries at 88 km (55 miles) with 2,700m+ elevati..

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 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 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..

The Secret Santa Tinsel Half Marathon is part of a festive series held in the scenic Brecon Beacons National Park, starting from Cwmdu Village Hall near Crickhowell, Powys. The event features three challenging trail distances: a 14km Figgy Pudding run, a Turkey Ten Mile, and the Half Marathon du Mul..

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 without time limits. The accessible paths feature varied terrain..

The Sea 2 Summit - Offa's Dyke Half/Full/Ultra is a challenging running event that takes place along the scenic Offa's Dyke footpath, starting from Prestatyn seafront. Participants can choose from three distances: Half Marathon, Full Marathon, and a new Ultra distance of 33 miles, which culminates a..

The Celtic Trail Races, held annually at Dare Valley Country Park in Aberdare, South Wales, offer a festive trail running experience with three distances: a 34-mile ultra, a 26-mile marathon, and a 13-mile half marathon. The courses traverse rugged, ancient Celtic tracks through Afan Forest and the..

The Nightmare Before Xmas Trail ½ Marathon is a challenging trail running event held at the Bridgend Miniature Railway Centre in Bridgend, UK. Participants first tackle "The Hateful Eight," an 8-mile route featuring mixed terrain including a tough hill, scenic road sections, and technical downhill f..

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 revealed as the race progresses. The event includes a Canic..

The Christmas Carol Bobble Hat Run, organized by Saturn Running, takes place in the scenic Dare Valley Country Park in Aberdare, Wales. This inclusive event welcomes runners and walkers of all abilities. Participants can choose their distance within a 7-hour time challenge, with a minimum of 3km and..

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 an ideal choice for both experienced runners and newcomers...

Saturn Running's "Spice Up Your Run - Wales" is a fun and inclusive running event held at Dare Valley Country Park in Aberdare. Participants can walk or run a minimum of 3km, with options to complete laps of approximately 7km each, allowing distances up to 50km, including half-marathon, marathon, an..

The Trails & Tarmac Backyard Ultra, organized by Limitless Trails, is an endurance running event held near Crickhowell in the Black Mountains, Powys, UK. The race features a 4.2-mile (approximately 4.17 miles in some editions) loop combining equal parts trail and tarmac, with mostly flat terrain, on..

The St David's Day Dragon Run 2026, organized by Saturn Running, takes place in the scenic Dare Valley Country Park in Aberdare, Wales. This 7-hour time challenge allows participants to run distances of their choice, starting from a minimum of 3km. The course features well-maintained footpaths with..

The Brecon to Cardiff Classic is a 70-kilometer ultra running event held annually in Wales, following the scenic Taff Trail from Brecon in the Brecon Beacons National Park to Nantgarw near Cardiff. The fully marked, one-way course showcases diverse landscapes, starting with dramatic mountain scenery..

The Brecon to Cardiff Xtreme is a challenging 47.5-mile (75 km) winter mountain ultramarathon held in Wales, running from Brecon to Cardiff over 11 peaks including Pen Y Fan, the highest peak in South Britain. With approximately 2,680 meters of ascent, the course demands excellent winter mountain ru..

The Loggerheads Trail 5k & 10k is a popular trail running event set to take place in March 2026 at Loggerheads Country Park. Participants can choose from three race options: a 5k Trail, a 5k Canicross Trail, and a challenging new 10km route. The courses feature a variety of terrains, including river..