Trail Running calendar near Harwell 2026-2027

Join this flexible timed event along the flat River Thames towpath in Walton on Thames. Complete as many laps as you like over seven hours to achieve distances from 5km to an ultra marathon.

Black Hill Trail Run in Bere Regis, Dorset features 5 km and 10 km trail races on rural terrain, organised by Bere Regis Scout Group. Course info, results, prize details and charity support are listed on the event pages.

Looped trail event in the Chilterns based at Henley on 26 September 2026. Offers 50 km, 25 km and 10 km distances with covered rest stops, GPS tracking, medical support and camping at basecamp.

An obstacle race weekend at Pippingford Park near Nutley, East Sussex, offering Sprint, Super, Beast, Ultra and Kids races across rolling, often wet terrain. The Ultra includes the British OCR Ultra Championship for eligible entrants.

A 10-mile trail race at Chilton Manor Farm featuring private trails, 240 m of elevation and a 1-mile Yew tree-lined finish. The route includes water stations, medics and a bespoke finisher medal.

A last person standing backyard ultra at The Waggoners pub in Welwyn where runners complete a 4.167 mile loop every hour until a single runner finishes a loop alone. Pub facilities, an athletes menu and limited marquee space are available.

A forest marathon and a shorter route from Memorial Hall in Henley in Arden, Warwickshire, running through early autumn woodland with staffed checkpoints and a hot finish meal. Surplus funds support the Heart of England Forest.

A five-lap ultramarathon in Berkeley, Gloucestershire across 25-27 September 2026, covering about 130 miles and 15,000 ft of ascent with a 24 hour cut off and 120 places, organized from Hamfields Leisure with camping and tracking included.

The Forest of Dean Autumn Half Marathon is a measured 13 miles 192.5 yards race on forest trails with no road crossings. Organised by the Rotary Club of the Royal Forest of Dean, the event raises funds for local and national charities.

Trail races at Salisbury Racecourse feature marathon, half marathon and 10K routes across undulating downland and Martin Down nature reserve, with finisher medals and trophies for the top three men and women in each event.

Volunteer run charity 10k and 3k through farmland near Grantchester on 27 September 2026, supporting Maggie’s Centre Cambridge and Addenbrooke’s Charitable Trust. Chip timing, medals, trophies, parking and post run services available.

Ten mile trail race at Eridge Park on 27 September 2026 featuring steep climbs, muddy and technical single track, GPX course maps, finisher memento, trophies and a free pint and cake for finishers.

Enjoy a flat riverside run along the Thames with a chocolate themed aid station. Choose your own distance from 5km to ultra marathon within a flexible seven hour time limit.

Experience a scenic off road run through the fields surrounding Manuden with distances of 10k, 5k, and 1k. Enjoy locally organized routes with course water stations and finisher medals for all participants.

MacTuffX London offers a unique interval running competition in September 2026. Participants can compete in solo doubles or relay categories over repeated 400 meter or 800 meter distances in Barking.

A coastal 10 km race from Portishead Open Air Pool with mixed terrain and sea views past Black Nore Lighthouse. The undulating route features a midway water station, chip timing and a finisher medal, with entries limited to 350.

Amport Trail Run on Sunday 27 September 2026 at Amport Cricket Club offers multi terrain 5k, 10k and canicross races across the Hampshire countryside. Entries are pre registration only with age limits and specific dog rules including a heat..

A multi terrain trail event near Marlow offering a Half Marathon, 10k and 1k along the Thames and through countryside. Entries include chip timing, a finisher medal and refreshments, and every entry plants a tree.

A six hour lap-based trail event at Coombe Abbey Park near Coventry, using a 3.3 mile loop through woodland and meadow. Options include a medal or a tree token, rucking is allowed and dogs are not permitted.

A night trail 10k at Coombe Abbey Park requiring a head or chest torch, with varied off road terrain, Petzl demo kit, on course refreshments in biodegradable cups, and charity and tree planting options.