Trail Running Calendar United Kingdom 2025-2026

The Tenacious Ten Endurance Challenge is a demanding 10-hour loop race held at Mynydd Troed in the Black Mountains of Wales. Participants tackle a strenuous and technical 3.2-mile (5.1 km) loop featuring a tough climb to the summit with stunning 360-degree views of the Black Mountains, Brecon Beacon..

The Westcountry Ultra 100 Miler is a challenging ultramarathon held in Somerset, UK, combining the Flat 50 and Hilly 50 routes into a 100-mile race with 9,538 feet of elevation. The course features diverse landscapes including canal paths, coastal trails, limestone formations, and Somerset’s highest..

The Run Rabbit Trail Festival is a multi-distance trail running event held at the scenic Deene Park Estate near Corby. Scheduled for May 2026, it offers three main challenges: the Trail Mix Challenge (25k, consisting of five different 5k runs hourly), the Headlight Hop (10k evening trail run), and t..

The Collingbourne Races, held at Crawlboys Farm in Ludgershall, offer a scenic off-road running experience through the beautiful Collingbourne woods. Featuring a half marathon and a 10km race, the course includes bridle paths, woodland tracks, and single-track trails, making it suitable for runners..

The Chiltern Hills 100K is a 100-kilometer ultra marathon held in the Chiltern Hills, Buckinghamshire, UK. The race features an anticlockwise loop starting and finishing in Chesham, passing iconic landmarks such as Ashridge Estate, Coombe Hill, Whiteleaf Hill, Bledlow Ridge, and Great Hampden. With..

The Westcountry Ultra Flat 50 is a 50-mile point-to-point ultramarathon held in Somerset, England, ideal for first-time 50-mile runners or those seeking a fast race. The course features a pancake-flat first half along the Taunton to Bridgwater Canal Path and the River Parrett Trail, with opportuniti..

Endurancelife Exmoor is a challenging trail running event set in the rugged and scenic western area of Exmoor National Park, England. It offers four distances: 10K (6.3 miles), half marathon (13.3 miles), marathon (26.5 miles), and ultra marathon (31.8 miles), each featuring significant ascents and..

The Formartine & Buchan Railway Ultra is a 12-hour and 6-hour ultra marathon held along the scenic Formartine & Buchan railway line in Scotland, between Maud Railway Museum and Auchnagatt village hall. The course covers an estimated 4.3 to 4.5 miles one way, with participants running as far as possi..

The Dukeries 30 / 40 is an annual trail running event held in Nottinghamshire, starting and finishing at Walesby Sports & Social Club near Sherwood Forest. Offering two distances—30.8 and 40.8 miles—the race follows a clockwise circular route mainly on forest trails, footpaths, and minor roads. The..

24 Hours South - The Offa's Dyke Ultra is a challenging 24-hour endurance event starting from Prestatyn on the North Wales coast, following the Offa's Dyke National Trail southwards. Participants, either solo or in teams of 2 to 4, aim to cover as much distance as possible along this scenic and dema..

The Holy Trail Festival of Running, held on May 9, 2026, takes place at Nicholas Everitt Park in Oulton Broad, Lowestoft, Suffolk. This inaugural event offers three trail running distances: a 50-mile circular route with a 15-hour limit, a 50 km course, and a full marathon, both starting at Holton Vi..

The Lap - Lake Windermere Ultra is a 47-mile (75K) trail ultra marathon circling England's largest lake in the Lake District. Open to both runners and walkers, participants have 24 hours to complete the fully marked, low-level course that offers stunning views and some of the most runnable trails in..

The Westcountry Ultra Hilly 50 is a challenging 50-mile ultramarathon held in Somerset, England, starting and finishing at West Somerset College in Minehead. Featuring 7,337 feet of elevation, the course offers stunning scenery including ancient woodlands, rugged coastline, moorland, and picturesque..

Shires and Spires is a celebrated multi-terrain running event held in Northamptonshire, starting and finishing at historic Naseby Village Hall. The race offers five distances: 10K, half marathon, three-quarter marathon, marathon, and a 35-mile ultra marathon, blending trails and roads with scenic vi..

The Halstead & Essex Marathon, established in 1995, is an annual running event held in North Essex, starting at Halstead Leisure Centre. Celebrating its 30th year in 2026, the marathon features a scenic course on low-traffic roads through rolling hills, woods, and farmlands, offering a beautiful and..

Giving it LARGE in Leeds is a new trail running event hosted by It's Grim Up North Running, set in the vibrant Leeds Dock area. The race features seven distances ranging from 5K to ultra-marathon, catering to all abilities with a generous 6.5-hour cutoff time. The course primarily follows scenic can..

The Zig Zag Marathon and Half Marathon take place at the Suffolk Running Centre in Bury St Edmunds, UK. The marathon follows the officially measured, scenic Kirtling Route, which is fully on road and mildly undulating, while the half marathon uses the Windmill Route, both featuring quiet roads. The..

The Hardmoors 26.2: White Horse Trail Marathon is a challenging trail running event held at Sutton Bank Visitor Centre near Thirsk, North Yorkshire. Part of the Hardmoors 26.2 Series, it features circular courses with three distances: a 28-mile marathon, a 17-mile half marathon, and an 8-mile 10k, e..

The Jack Bloor Race will take place in Ilkley on Tuesday 12 May 2026.

The Centurion North Downs Way 50® is a challenging 50-mile point-to-point ultramarathon held annually along the North Downs Way National Trail in England. Starting in Farnham, Surrey, and finishing at Knockholt Pound near Greater London, the course features approximately 5,600 feet of elevation gain..