Trail Running calendar near Harwell 2025-2026

Looped trail running at Avon Tyrrell in the New Forest, circling a Grade I listed manor on technical forest trails that blend scenery and challenge. Pick your distance on the day from 5K to ultramarathon and earn a finisher medal.

Run the flat, riverside Ouse Valley routes in Huntingdonshire with marathon and half marathon options on grass, gravel and tarmac paths. Enjoy peaceful river views and fast courses suitable for trail runners of all levels.

Take on scenic looped trails from Henley with supported 10 km, 25 km and 50 km options, full aid, medical cover and finish line hospitality on Saturday 26 September 2026. Walkers and runners of all paces welcome.

Tackle a scenic 10 mile trail across gravel tracks, woodland and open views, finishing along an 800 year old Yew tree lined avenue. A new 1 km kids run makes this a perfect family day at Chilton Manor Farm.

Run through ancient woodland in the Forest of Dean at the Autumn Half Marathon starting and finishing at Speech House. This scenic 13 mile trail on well marked tracks supports local charities and awards a medal to every finisher.

Race on the Chase features marathon, half marathon and 10k routes across rolling chalk downland, woodland and ancient sites in Martin Down, finishing at Salisbury Racecourse. Every finisher gets a medal and the top three men and women win t..

Run 10 km or 3 km through flat, scenic Grantchester farmland on 27 September in a friendly volunteer event. Support Maggie's Centre Cambridge and Addenbrooke's while enjoying medals, refreshments and post race treats.

Tackle the Kingfisher Challenge, a six hour looped trail at Coombe Abbey Park near Coventry where runners complete as many laps as they can within the time. Enjoy varied trails, facilities and a choice of medal or tree token.

Tackle the South Downs 100 mile, a single loop through the National Park with rolling hills, stunning viewpoints and roughly 12k ft of ascent. Aid stations and a 34 hour cutoff make this a classic ultra challenge.

Run to the Sea Bournemouth is a 50 km ultra on 3 October from Moors Valley to Hengistbury Head via flat forest trails and seafront paths. Fully supported with feed stations, medical cover and a bespoke medal.

Take on the Epping Forest 50 KM 2026, a scenic 50 km trail challenge through ancient woods on 3 October 2026. Enjoy varied terrain, fresh air and a memorable run just outside London.

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.

Run under the stars on the South Downs at The Dark Downs, a dusk to dark looped event at Plumpton Racecourse offering 50k and Half Marathon distances. Enjoy rolling trails, reflective course markings and volunteer aid stations.

Take on a 50 km point to point ultramarathon from Moors Valley to Hengistbury Head, blending forest trails and coastal paths into a flat, scenic course. Perfect for seasoned road and trail runners seeking a stunning autumn challenge.

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.

Run along the scenic Thames Path at Thames Meander Autumn, offering 10 km, half marathon and marathon options on a flat, runnable riverside trail. Well supported with aid stations and medical cover, it is a great autumn outing for all paces..

Discover Wild Run Oxford on scenic trails just minutes from the city centre, with 10K and half marathon routes across smooth and rugged terrain. Licensed by the Trail Running Association and UK Athletics, it offers a genuine trail challenge..

Join the Marlow Donkey on 4 October 2026 from Liston Hall, choosing 25 km, 40 km or a special 50 km route through Hambleden and Bix. Limited to 150 places, the LDWA event offers friendly checkpoints and a simple finish meal.

Guided 30 mile trail run through the Surrey Hills from St Martha's Hill, taking in Denbies Wine Estate and the top of Box Hill. Led by an experienced ultra coach, this friendly group run promises an epic day on the North Downs Way for seaso..

RunThrough Trails Beat Box Hill offers scenic, hilly trail routes of 21k, 31k and 50k across chalk climbs and woodland with stunning views. Enjoy chip timing, kilometre markers, an event village, themed medal and free photos.