Trail Running calendar near Boreham 2026-2027

A riverside event at Wraysbury Skiff & Punting Club offering 10 km, half marathon and marathon courses along the Thames Path with marked laps, marshals, a bespoke finishers medal and prizes for top finishers.

A weekend of muddy obstacle races at the Secret Nuclear Bunker Estate in Essex, with distances from 1.5 km to 38+ km, signature obstacles like the Deathslide and zip lines, chip timing and on-site facilities.

A **5 km** run at Banham Zoo that passes animal enclosures, includes full-day zoo entry and a finisher medal, and raises funds for conservation; spectator tickets and fundraising prizes are available.

Experience the twilight beauty of Ardingly Reservoir during this evening run in West Sussex. Choose between a 5K or 10K distance on an undulating trail course featuring scenic water views and a finisher medal.

A Pretty Muddy 5k obstacle course at Norfolk Showground featuring climb, crawl and slide elements on a mostly flat route contained within the showground. Participants must be 13 or older and a minimum fundraising target of £50 applies.

A road marathon on scenic low traffic lanes around Halstead, marking its 30th running on 10 May 2026. The event is limited to 500 entries, is part of the Essex Road Running Championships and supports local charities.

A multi distance running event around Naseby in Northamptonshire featuring road and trail sections, landmark views and annually reversing course direction. Distances range from a 10K up to a 35 mile ultra with varied aid and navigation arra..

Road marathon and half marathon from Suffolk Running Centre on measured Kirtling and Windmill routes. Aid stations every 10k, parking included and bespoke finisher medals; the event is cupless so bring your own bottle or cup.

Off-road 10k, 5k and junior runs at Milton Creek Country Park on 10 May 2026. The event supports the Oliver Fisher Special Care Baby Trust and includes medals, prizes, pacers and limited free on-site parking.

Trail races at Rathfinny Wine Estate on undulating off road loops with marked routes, aid stations and recycled finisher medals. The carbon neutral event supports the WOLO Foundation and offers single and double loop options.

An approximately 13 mile self guided loop around the Garden City Greenway starting and finishing at Standalone Farm, organised under UKA rules with a three hour time limit and proceeds donated to the charity GRIT.

Trail races in the South Downs around Cocking on 10 May 2026, offering 10 km and 20 km senior courses plus 3 km and 5 km junior races on mostly off road trails with water stations, marshals and age category awards.

A one day 30 km trail run in the Chiltern Hills near Tring with guided trail technique instruction, a well stocked checkpoint and a finisher's medal. The route runs through woodland, ridge lines and rolling hills with about 500 m ascent.

An inclusive UK trail running series offering 1K, 5K, 10K and kids races with free entry for under 16s, held at Dunstable Downs in May and Blaise Castle Estate in October 2026, with activities, food and live music.

Hairy Legs is an all ages cross-country event at Sheepcot Recreation Ground on 10 May 2026, with children's laps, teenage and adult loops plus solo and relay options, and proceeds supporting two local primary schools.

A one lap *10 km* trail through Hampton Estate and Puttenham Common with undulating hills and bluebell woods. Chip timing, finish medals and on-site parking, with food and refreshments available at the finish.

A cross country event in Little Gaddesden on 10 May 2026 offering 10K, 5K and mini races for under 7s. Pre registration and on the day fees apply and medals are awarded to all finishers.

A self‑navigated trail event in Thaxted on 10 May 2026 raising funds for Thaxted Windmill restoration. Two route options are offered, 5 miles (8k) and 8.25 miles (13k), with entry fees and a refreshment voucher included.

Race 2 of the Northants 5 km Series is at West Lodge Farm in Desborough on multi terrain routes through fields and nature trails. Finishers receive a bespoke medal; parking is free and on site refreshments are available.

A measured off-road 5K on 13 May 2026, Race 2 of the seven-race Crown to Crown series, run mainly on bridleways through Willow Park with limited parking and on-course safety support.