Winter Celtic Trail Races

Aberdare, United Kingdom • 13 Dec 2025

The Winter Celtic Trail Races, taking place in December 2025, offer a thrilling trail running experience across three distances: a 50k ultra, a full marathon, and a half marathon. Set in the stunning landscapes of Afan Forest and the Rhigos mountain range, participants will navigate ancient Celtic tracks, enjoy breathtaking views of the Brecon Beacons, and finish at the vibrant Dare Valley Country Park. The routes feature a mix of sharp climbs, fast descents, and river crossings, ensuring a challenging yet rewarding adventure. All courses are fully marked, with checkpoints providing refreshments along the way. Visit the organization's website for the most recent information.

Race information

34 mi
5850 m+
Celtic Ultra
26 mi
4200 m+
Celtic Trail Marathon
13 mi
2200 m+
Celtic Trail Half Marathon
Visit the organization's website for the most recent information.
Trail runs nearby

The Vale Coastal Trail Races, taking place on April 5, 2025, celebrate their 10th anniversary as the original ultra marathon and trail races along the Vale of Glamorgan coastline. Participants can choose from three distances: a 32.5-mile ultra, an 18.5-mile trail (often referred to as a mini ultra),..

UTMB Index

The CANUM 2025 is a thrilling 40-mile ultra marathon set along the picturesque Monmouthshire & Brecon Canal in Wales. Participants will embark on an adventure that showcases the stunning Usk Valley and the natural beauty of the Brecon Beacons National Park. The route begins at Fourteen Locks and con..

The Beast of the Beacons is a challenging trail running event featuring 10, 20, and 40-mile routes set in the stunning Brecon Beacons National Park. Designed for both elite and beginner trail enthusiasts, participants will navigate a variety of terrains, including steep climbs, rocky paths, and sere..

Rasus y Bannau is an exciting long-distance running event taking place in Brecon, featuring three challenging races: a 100 km ultra, a 45-mile ultra, and a marathon. The routes traverse the stunning Bannau Brycheiniog (Brecon Beacons) National Park, offering participants breathtaking views and diver..

UTMB Index

The Sirhowy Challenge is a 10-mile multi-terrain race set in the scenic Sirhowy Valley, featuring a challenging ascent of 1500ft to Machen Trig Point. Scheduled for May 4, 2025, the event welcomes participants aged 17 and over, with entry fees of £12 for UK Athletics registered runners and £14 for n..

The Afan Chase Trail Races, scheduled for May 10, 2025, offer an exhilarating trail running experience through the stunning Afan and Glyncorrwg forests. Participants can choose between a half marathon and a 10k race, both featuring diverse terrains including forest paths and single tracks. The route..