Trail Running Calendar United Kingdom 2025-2026

The ZigZag - Thetford Festival of Running takes place at High Lodge in Thetford Forest, Brandon. This intimate event offers multiple race distances including 5k, 10k, Half Marathon, Full Marathon, and Ultra Marathon, all run on a mainly flat 5km loop course through pathways, trails, and woodland wit..

The Two Tunnels Races, taking place in February 2026, offer a unique running experience through Bath's historic underground tunnels, the longest of their kind in the UK. Participants can choose from a variety of distances, including ultra marathons, half marathons, 10km, 5km, and family-friendly Col..

The Derwent Reservoir 5 & 10 Milers is a popular winter running event returning for its seventh year, offering participants a choice between 5 or 10-mile routes around the scenic Derwent Reservoir, located on the border of Durham and Northumberland. The courses feature a mix of terrain, including fi..

BigMud Trails (EARTH) is the first event in the Classic Element Trail Series, celebrating the element of Earth. Set in the scenic Meon Valley at Queen Elizabeth Country Park, participants can choose between a 16-mile or marathon distance, both featuring challenging single-lap courses with significan..

The Badger Challenge is a 6-hour trail running event held at Beacon Hill Country Park in Leicestershire, UK. Participants run multiple laps of a 3.3-mile off-road loop featuring a challenging course with an uphill first half and a downhill second half, offering stunning panoramic views. Runners can..

The Tibthorpe Loop is a half marathon trail event held in the scenic Yorkshire Wolds, starting and finishing at the eco-friendly Field House Camping & Coffee Barn near Tibthorpe, Driffield. The course is an easy-to-navigate, undulating but non-technical 13.1-mile route with 1,200 feet of elevation g..

The Fitstuff G3 Series No.3 is a running event held at Newlands Corner, Drove Road, Guildford, Surrey. Participants can choose between 10km and 15km race distances. The event offers a scenic course starting and finishing at Newlands Corner, with parking available on-site.Runners can also opt for bun..

The Hameldown Hammer is a premier trail running event held in Widecombe-In-The-Moor, Dartmoor, featuring three challenging races: the Hammer Half Marathon, the 7EVEN (an 8-mile race), and the inaugural Ultra Hammer. Celebrating its 10th anniversary, the event showcases Dartmoor's rugged granite land..

The Chester Ultra 50 is a 50-mile ultra-marathon held in Chester, UK, featuring 849 meters of elevation gain. Celebrating its 10th anniversary in 2026, the race is organized by GB Ultras and follows scenic trails including the North Cheshire Way and the Sandstone Trail, passing through Helsby Hill,..

Capers and Canines in the Colliery is a trail running event held at Rabbit Ings Country Park in Barnsley, South Yorkshire. Participants tackle a 5-mile lapped course featuring a short, steep climb that offers scenic views of the surrounding countryside. The event takes place during late spring, prov..

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 unique 7-hour time challenge allows participants to run multiple laps of a 4.37-mile (7km) course on well-maintained footpaths with beautiful countryside views..

Cloud Nine is a scenic and challenging 9-mile hill race organized by Congleton Harriers, starting in Congleton and ascending to the summit of Bosley Cloud at 1125 feet before returning via the ancient Bridestones. The mostly off-road course features 1250 feet of ascent and is categorized as a BM fel..

The Scurry Around Corstorphine Hill 2026 is a trail running event held in Edinburgh, featuring 10km and 5km races along with a 1km family fun run. The courses are off-road, clearly marked, and marshalled, starting from a field opposite the Leonardo Murrayfield Hotel. The 5km race is one lap, while t..

The Weymouth Bay 10K is a scenic charity fun run held in Weymouth, Dorset, starting at Bowleaze Green near the Riviera Hotel. The course is an accurately measured out-and-back route featuring two laps, extending towards Pleasure Pier and returning via Overcombe. The mostly flat road terrain (88%) of..

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 Culzean Castle Trail Runs, held at the scenic Culzean Castle and Country Park in Ayrshire, Scotland, offer a variety of trail running distances suitable for different ages and abilities. Participants can choose from a 5km run (ages 11+), a 10km run (ages 15+), or a half marathon (ages 17+). The..

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 High Lodge Half Marathon - Spring is a scenic trail running event held in Thetford Forest, known for its wildlife including fallow deer and wild thyme. This circular half marathon course features a mix of hard-packed sand, grassy footpaths, and forest trails, offering a multi-terrain challenge s..

The Pitsford Water Trail Races, organized by Race Harborough, take place at Brixworth Country Park in Northamptonshire. This event offers two fully marked and marshaled trail races: a 10k and a half marathon. The 10k provides an ideal introduction to trail running, while the half marathon presents a..

Saddleworth Res's is a challenging trail running event held in the high moorlands and valleys around Saddleworth, near Oldham, UK. Participants can choose from three distances: 5 Res’s (25 km with 710m ascent), 10 Res’s off-road marathon (44 km with 1314m ascent), or the 15 Res’s ultra marathon (60..