Trail Running Calendar East of England 2025-2026

This is a backyard ultramarathon in which participants run a repeated loop. Each loop is 4.167 miles (6.7 km). Runners must start each loop precisely on the hour and must complete the loop within that hour to continue. If a runner fails to complete a loop in time or does not start the next loop, th..

The Essex AA Cross Country Relays will take place on Saturday 11 October 2025 at Hylands Park, Chelmsford, CM2 8FS. The event is hosted by Billericay Striders and follows the 2024 format for 2025. Race formats include: U13/15/17 Girls - 3 legs of 3 km (1 lap) U13/15/17 Boys - 3 legs of 3 km (1 lap..

Endurancelife Suffolk takes place in Dunwich, Suffolk, offering four distances: 6.1 miles (10K), 13.5 miles (half marathon), 26.7 miles (marathon) and 32.7 miles (ultra). The courses are described as extremely flat by Endurancelife standards, making them fast and potentially a series favourite. The..

Aliens V's Trail Runners Daylight Trail is a trail running event held near Rendlesham Forest, a popular area known for its natural beauty and UFO lore. Scheduled for October 12, 2025, the event offers both a full marathon and a half marathon, with routes that are 95% off-road across diverse terrain...

The Ridgeway Run is a challenging 15-kilometre (9.3 miles) trail race organized by Tring Running Club, featuring scenic routes mainly on footpaths and bridleways with stunning views of the Chilterns. The course starts near Tring, ascends through the Ashridge Estate past the Bridgewater Monument, fol..

West Acre Wild 10k Challenge is an off-road 10-kilometre race set in Westacre, Norfolk. The course winds through undulating bridle paths and woodland tracks, with a short paved section at the start and surfaces that can be wet or muddy after rain. Optional obstacles add variety, and the route finish..

North Chilterns 50K is Runaway Racing’s 50-kilometre trail ultramarathon based at Putteridge Bury Country House (LU2 8LE). The course follows the Chiltern Way toward Lilley, then Warden and Barton Hills, before heading to Pegsdon Hills and Offley, finishing with final 12 km. Runners enjoy undulating..

Southend Pier Marathon takes place in Southend-on-Sea on the world’s longest pleasure pier. The event is described as a full marathon run on the sea, with the pier measuring about 1.34 miles and runners completing multiple laps to reach marathon distance on an open pier. The race is limited to 100 p..

The Tarmac Twister Trail takes place on 15 October 2025 and is organised by Essex Trail Events. The route is approximately 6 miles and the minimum age is 16. The event holds TRA permit 7706. It is a self-navigation trail race using a written route description that will be issued on the night. The c..

High Lodge Half Marathon – Autumn is a 13.1-mile circular trail race in Thetford Forest at High Lodge, Brandon, IP27 0AF. The multi-terrain course combines hard-packed trails, forest paths, sand and grassy footpaths, delivering woodland scenery for road runners and trail enthusiasts alike. The event..

Viper 5 mile trail run (Autumn edition) is held near Ingatestone, Essex, at The Viper in Mill Green. The 5-mile loop traverses countryside on public rights of way and is run in the dark, using the same course as the spring edition. It’s a small-capacity event (50 places) with first-come, first-serve..

Blackwater Marathon 2025, organized by the LDWA Essex & Herts Group, takes place on Saturday 25 October at Drapers Farm Sports Club, Heybridge, Essex. This 25th edition features two circular routes: 26.5 miles and 18 miles, run on cross‑country footpaths and seawall sections on the north side of the..

Epping Forest Wildwood Trail Series Half Marathon & 10K takes place in Epping Forest, London, with start/registration at Chingford Plain, Rangers Road, E4 7QH. Runners choose between a Half Marathon (two laps) or a 10K (one lap) through ancient woodland in autumn colors. The course blends well-maint..

Stort30 is a 30-mile ultramarathon organized by Challenge Running, set on the Hertfordshire–Essex border along the River Stort and the Lee Navigation. The course is flat and mostly grassy, running 15 miles out and back from Bishop’s Stortford to the Rye House area, with a turnaround at the halfway p..

Pumpkin Plod is a timed running event held at Ferry Meadows, one of the largest country parks near Peterborough, UK. Participants run laps of a 5.3 km multi-terrain course featuring gravel footpaths and grassy areas through the forest. The event offers two options: a 6-hour or 4-hour challenge, wher..

Chiltern Ridge Winter 50K is a single-loop trail ultra starting and finishing at Berkhamsted Cricket Club in the Chilterns. The 50-kilometre course climbs about 800m and threads through Berkhamsted Common and the Ashridge Estate, then follows The Ridgeway National Trail to Aldbury and Wendover befor..

The ZigZag Catherine Wheel Canter is a unique running event held at Wodson Park Sports and Leisure Centre in Ware, Hertfordshire. Participants can choose from various distances including 5k, 10k, half marathon, full marathon, 50k ultra, or a 6-hour challenge, all run on a traffic-free 400-meter athl..

Winter Warrior 50km Ultra is a winter trail ultramarathon from Norwich to Diss along the Boudicca Way. The well-marked route stays on the Boudicca Trail from Trowse, Norwich to Hope Church, Diss, winding through Caistor St. Edmund, Stoke Holy Cross, Saxlingham, Tasburgh, Fritton, Pulham Market and S..

The Fireworks 50 is a 50-mile running event organized by Zig Zag Running, held at Wodson Park Sports and Leisure Centre in Ware, Hertfordshire. Now in its fourth year, this unique race takes place on a traffic-free athletics track, offering runners a safe and controlled environment. Limited to 50 pa..

Brewery Trail Run is a 6-mile (10 km) trail run through the Chiltern Hills organized by Run The Wild. The event pairs trail running with a brewery experience at the world famous Tring Brewery: after the run, participants enjoy a private brewery tour, a beer tasting, and receive a bottle of beer. It’..