Trail Running calendar near Harwell 2026-2027

A single-loop 100 mile trail from Plumpton Racecourse in the South Downs National Park, featuring over 12,000 ft of elevation, 12 aid stations, a 34 hour cutoff and free onsite camping. The race forms part of the South Downs Triple Crown.

A guided group ultra run from St Martha's in Guildford along sections of the North Downs Way via Box Hill and Denbies Wine Estate, with kit support, group pacing and an alcohol free beer offered at the finish subject to availability.

Inflatable 5K at Kempton Park Racecourse in Sunbury on Thames on Saturday 3 October 2026. Choose 2.5k, 5k, 10k or 15k laps of inflatable obstacles with music zones, a finisher's medal and on-course water.

A 50 km point-to-point ultra from Moors Valley Country Park to Hengistbury Head with mixed forest and seafront terrain, GPS route files, four feed stations, tracking options and on-course medical support.

Experience an ultra distance eco trail through the ancient woodlands of London. This event takes runners on a 50 km journey starting from Capel Road into the natural paths of Epping Forest.

Hit the trails at London EcoTrail 25 KM on 3 October 2026 in Epping's Bell Common. Enjoy a scenic 25 km route through woodlands and countryside, perfect for trail runners craving a nature filled challenge.

Looped night races on the South Downs at Plumpton Racecourse offering a 50k and a half marathon over rolling runnable trails. The event features marked routes, reflective signage, aid stations and set time limits for completion.

A *50 km* point-to-point ultramarathon from Moors Valley Country Park to Hengistbury Head, featuring forest trails, coastal paths and a fully signed flat course. The race includes four feed stations, a GPS route file, medical cover and a 9...

Trail races from Queen Elizabeth Country Park across the South Downs with five distances from 5 km to 51 km. Routes use chalky ridgeways and woodlands, with varied outpost coverage and a plastic-free refill policy.

Guided 30 mile trail run on the North Downs Way from St Martha's Hill, featuring Box Hill and Denbies Wine Estate. Group-paced with coach support, aimed at first-time ultra runners; a post-run alcohol-free beer may be provided.

Wild Run Cotswolds showcases rugged off road trails on a private estate with fully marked routes, chip timing and a family friendly supporter zone. Entries are limited to 600; choose 10K, half, marathon or the six hour 360 challenge.

Scenic out and back races along the Thames Path from Petersham & Ham Sea Scouts HQ to Barnes, offered as 10 km, half marathon and marathon options with staffed checkpoints and medical cover.

A Thames Valley LDWA challenge walk from Marlow offering 25 km, 40 km and 50 km routes through the Hambleden and Stonor valleys, limited to 150 places with checkpoints, food provisions and required safety equipment.

Test your endurance at MacTuffX Brierley Hill in October 2026. Choose between 400m and 800m intervals in solo, double, or relay formats for a unique racing experience. This event is open to all participants aged 18 and over.

Experience a scenic multi terrain race through East Grinstead dedicated to local charities. This friendly event features a flat course along bridleways and residential roads with chip timing and a sustainable finisher medal.

Timed trail event in the Forest of Bere using a 3.28 mile out and back lap with distances from 5 km to ultra. Aid station offers sweet and savoury food including potatoes and vegan options; 20% of proceeds support Forestry England.

Half marathon and 10km around RAF Greenham Common in Berkshire on a flat, traffic free course. The in-person event supports New Life Special Care Babies and includes water stations and a children’s race.

A point to point marathon on 4 October 2026 from Salisbury to Winchester along the Clarendon Way. Over 90% of the 26.2 miles is off road and a five mile Mini option is also available.

Bristol Epic Trail Sponsored By GORUCK is a trail running event at Ashton Court Estate in Long Ashton, Bristol on Sun 4th Oct 2026. Entry details, reviews, photos, course maps, and results are provided for the event.

A chip timed 10 km trail race on 4 October 2026 through Somerset countryside, passing a prehistoric long barrow. The event includes a bespoke medal, Race Nation app support, camping nearby and proceeds shared with two charities.