Trail Running calendar near Nantgarw 2025-2026

We have found 235 Trailruns within 80 miles of Nantgarw. See below where and when you can find the races.

Bristol MoRunning is a charity running event held at Ashton Court Park, featuring 1.5k, 5k, and 10k races to support Movember’s men’s health initiatives. The course combines trail and path running, with a hilly section from 1km to 3km, suitable for dogs and off-road buggies but not wheelchair access..

DirtRun In The Dark is an exciting 10km off-road running event set in the scenic Wyre Forest at the Callow Hill Visitor Centre. Participants will navigate a two-lap course under the cover of darkness, making headlamps or torches a mandatory requirement. The event welcomes runners aged 14 and above,..

Dusk Till Dawn The Winter Edition is an exciting running event organized by Mad Running Junkies, set in the scenic Bridgend, South Wales. Participants will tackle three 10-mile routes over a challenging 12-hour period, starting at dusk and finishing at dawn. This event is designed for those looking..

The Trails & Tarmac 12hr Backyard Ultra is an exciting endurance running event set in the scenic Black Mountains near Crickhowell, Powys. Participants will tackle a 4.2-mile loop, completing as many laps as possible within a 12-hour timeframe. The first 11 laps must be finished within an hour each,..

The Bath Skyline event features a fun and challenging 10km off-road running series set against the stunning backdrop of the Bath Skyline. Participants can choose between day and night races, with routes that include a mix of solid stone paths, woodland trails, and open meadows, offering breathtaking..

The Margam Trail Races, organized by Trail Revolution, will take place in Margam Park on November 15, 2025. This event features a variety of race distances, including 5km, 10km, and a half marathon, designed to challenge participants on the park's scenic forest paths and woodland trails. The course..

The Callow Fell Race, organized by Mercia Fell Runners, is a challenging event that has transitioned from a summer to a winter series race. Covering a distance of 8.1 km with a total ascent of 762 meters, it is recognized as one of the toughest races in Shropshire. The course features steep climbs a..

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 Broadway Marathon is a challenging running event set in the picturesque northern Cotswolds, known for its hilly and muddy terrain. Licensed by the TRA and adhering to UK Athletics rules, the marathon is open to participants aged 18 and older. The event promises stunning scenery, making it a uniq..

UTMB Index

DirtRun In The Dark is an exciting 10km off-road running event set in the scenic Wyre Forest at the Callow Hill Visitor Centre. Participants will navigate a two-lap course through tracks and trails under the cover of darkness, making headlamps or torches a mandatory requirement. Open to runners aged..

December 2025

The Secret Santa Tinsel Half Marathon, along with the Tinsel Twelve 12k and Turkey Ten miles, is an exciting running event set in the scenic Brecon Beacons National Park. Participants will enjoy beautiful trails starting from the historic Tretower Court & Castle, with routes offering stunning views..

The East Devon 8 and 5 Trigs event offers trail running challenges in East Devon with three distance options: a 3-trig half marathon (21km), a 6-trig marathon (42km), and an 8-trig ultramarathon (53km). The routes are self-navigated, unmarked trails starting from Budleigh Salterton, featuring varied..

The East Devon 8 Trigs is a self-navigation trail running event held in East Devon, starting and finishing at Budleigh Salterton Cricket Club. Participants can choose from three distances: a 21km half marathon (3 Trigs), a 42km marathon (6 Trigs), or a 53km ultramarathon (8 Trigs). The course featur..

The Cardington Cracker is a popular fell running event organized by Telford Athletic Club, taking place in Cardington, Shropshire. The race covers a distance of 14.5 km with a total ascent of 793 meters, making it a challenging course, especially in December's conditions. Participants must pre-regis..

The Celtic Trail Races 2025, held in Aberdare, Wales, is a festive trail running event featuring three race options: a 50k ultra, a marathon, and a half marathon. The courses traverse scenic areas including Afan Forest, Rhigos Mountain, and the Brecon Beacons, with routes passing ancient Celtic trac..

The Nightmare Before Xmas Trail ½ Marathon is a challenging running event set to take place at the Bridgend Miniature Railway Centre. Participants will tackle a mixed terrain course that includes an 8-mile section known as The Hateful Eight, followed by an additional 5 miles filled with obstacles li..

The Slow and Dirty is a festive-themed 19-kilometer trail race held in Sturminster Newton, Dorset, following a level, hard-surfaced route along a historic railway line known as the Somerset and Dorset. The course offers scenic views along the River Stour valley, passing charming villages, the restor..

The Plain Crazy Winter 12.5 Mile run is a challenging event set in scenic and potentially snowy conditions, taking place on December 28, 2025. Participants can expect a hilly course that tests their endurance, with a 3.5-hour cut-off time. The event supports The Royal British Legion Poppy Appeal and..

January 2026

The Bell Challenge Day 5, organized by Running Events Devon, takes place on January 2, 2026, in Exmouth, Devon. This 7-hour timed event features a mainly flat, 5.3 km out-and-back course along a scenic, disused train line, fully paved and accurately measured as a road race. Participants of all abili..

The Walter Raleigh Round Half Marathon is a scenic running event held in Budleigh Salterton, England, covering 13.6 miles. The course explores the birthplace and childhood countryside of Sir Walter Raleigh, featuring quiet back lanes, unsurfaced county roads, footpaths, the Otter Valley, High Peak,..