Trail Running calendar near Llanberis 2025-2026

We have found 105 Trailruns within 80 miles of Llanberis. See below where and when you can find the races.

The RunThrough Snowdonia Sea2Sky event features 53k and 25k trail races set against the stunning backdrop of Snowdonia. Scheduled for September 6, 2025, participants can expect a challenging course with breathtaking views. The event includes chip-timed results, water stations, and a marshalled cours..

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The Battle of the Borders is a trail running event held in the Shropshire Hills, offering participants a choice between a half marathon (13.1 miles) and a full marathon (26.2 miles). The race takes place in the scenic National Trust area of Carding Mill Valley near Church Stretton. The course is a s..

The Yr Wyddfa Ultra 50 is an exhilarating ultra-marathon set in the stunning Snowdonia National Park, specifically around the village of Betws-y-Coed. Covering a challenging distance of 45 miles with an elevation gain of 3,254 meters, this event invites experienced runners to navigate rugged mountai..

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The Across Wales Walk is a renowned challenge walking event that spans 45 miles across Wales, allowing participants to walk or run the route within 18 hours. Celebrating its 62nd year, the event offers a full weekend experience, including overnight accommodation, transport, refreshments along the ro..

The Yr Wyddfa Ultra 100 is a challenging 102-mile ultramarathon set in the stunning Snowdonia National Park, featuring an elevation gain of 5788 meters. Scheduled for September 6, 2025, the event allows 250 participants to navigate the mountainous terrain, with checkpoints providing essential suppor..

The 2 Hillforts Hill Race is an exciting running event set to take place in 2024, starting and finishing at Plas Dolben Farm in Llangynhafal. Participants will tackle a challenging course that spans just under 9 miles, featuring a significant ascent of 2500 feet as it navigates the scenic Hillforts..

The Sandstone Trail Races feature a unique trail running experience in Cheshire and North Wales, offering two concurrent point-to-point races. The event starts at Bickerton Hill National Trust Car Park and concludes at Kelsall Hill Equestrian Centre, providing excellent facilities for participants a..

The Stretton Skyline is a challenging fell running event organized by Telford Athletics Club, taking place in Church Stretton, Shropshire. The race covers a distance of 30.5 km with a total ascent of 1357 meters, making it suitable for experienced runners. Participants must pre-register, and the cou..

The Snowdonia Mountain Skills Weekend, organized by Running Adventures, offers an immersive experience for advanced trail runners looking to enhance their mountain skills. Set in the stunning Nantlle Valley, participants will engage in challenging activities, including steep climbs and navigation ex..

Defeat Delamere is an annual running event held at Delamere Forest in Frodsham, supporting the Roy Castle Lung Cancer Foundation. The event features multiple race options, including 5k, 10k, 16k, and a mini-miler for children, with varying start times and entry fees. Participants receive a race pack..

The Abersoch Half Marathon is a scenic 13.1-mile race held in the picturesque seaside village of Abersoch on the Llyn Peninsula in North Wales. The course features a mix of road running through charming villages, culminating in an exhilarating final kilometer along Abersoch Beach. Participants enjoy..

The Pumsaint Trail Half Marathon is set to take place on September 21, 2025, featuring a challenging 13.1-mile course through scenic trails. Participants can also join a 6.5-mile fun run and children's races, promoting inclusivity for all ages. The event offers age category prizes for the half marat..

The Brown Clee Burn is a challenging multi-terrain running event scheduled for September 21, 2025. Covering approximately 11 kilometers, the course features steep climbs, long descents, and stunning views, catering to runners of various skill levels. The event starts and finishes at Stoke St Milboro..

The Town to Tower 10K is an uphill race that takes participants from the charming market town of Ruthin to the summit of Moel Famau, located in the stunning Clwydian Hills. This unique 10K route offers a challenging experience for runners of all abilities, culminating at over 550 meters above sea le..

The Bridgeathon, organized by Preston, Fylde & Wyre Running, is a multi-distance running event featuring a 10K, half marathon, marathon, and ultra marathon. Set along the scenic Lancaster canal, participants will encounter 43 bridges throughout the marathon route. The event offers a flat course, ide..

The Delamere Forest Wildwood Trail Series features a thrilling Half Marathon and 10K trail run set in the scenic Delamere Forest, Cheshire. This event welcomes runners of all abilities to navigate through beautiful woodlands and challenging terrain, including steep climbs and muddy sections. Partici..

October 2025

The Loop Ultra is an exciting 50km (32 miles) trail running event set in the stunning Cambrian Mountains of Mid Wales, taking place at Camp Plas, Dolanog. This unique challenge attracts participants of all skill levels, from elite runners to beginners, and emphasizes sustainability with a capped ent..

The Breidden Hills Race, organized by Mercia Fell Runners, is a challenging fell running event set in the scenic West Midlands. Participants will tackle a distance of 11.5 km with a total ascent of 790 meters, making it a demanding course for runners. The race requires pre-registration and is open t..

Loggerheads Autumn Trails is an exciting running event featuring longer versions of popular 5k and 10k races, set in the scenic Loggerheads Country Park. Participants can choose from a 14k race, which consists of two loops of a 7k course, or a 7k Canicross discipline, welcoming runners of all abilit..

The Brenig Way 50K Trail Race is a scenic running event set in the beautiful upland scenery of North Wales. Starting in Corwen, participants will navigate a marked 32-mile footpath that includes diverse terrains such as country lanes, technical climbs, and forest tracks, culminating at the picturesq..