Trail Running calendar near Colden Common 2026-2027

A 5k obstacle course at Royal Windsor Racecourse with mud obstacles to climb, crawl and slide, mixed tarmac and grass surfaces, staggered wave starts and a minimum age of 13. Earlybird entry prices and a fundraising target apply.

A 5 km obstacle course at Prospect Park in Reading where participants climb, crawl and slide across grassy slopes and woodland. Waves run every 15 minutes and the event is open to people aged 13 and over.

A 5k muddy obstacle course at Willen Lake with staggered wave starts, on-site toilets and parking, blue badge parking nearby, and a fundraising target of £50. The event is not wheelchair accessible.

Backyard Ultra at Chilton Manor Farm on 5 June 2027 features a 6706 m loop run each hour until one runner remains, with weekend camping, on route water stations, event camp facilities and medical support.

At Prospect Park in Reading this Race for Life event offers a 10k run as two laps of the 5k course plus a separate 5k option, with grass and woodland terrain and some steep slopes.

A multi distance running event in Bath that features long underground sections through the Devonshire and Combe Down tunnels and a city centre start and finish at Brickfields Park. Races range from 500 m Colourburst to an ultra marathon.

Park-based 3k and 5k runs at Dunorlan Park with mixed grass and woodland terrain. The event is organised by Cancer Research UK and includes a fundraising pack and a finishers medal.

A multi distance trail event in the Chilterns AONB near Hitchin on 6 June 2027, with 10 km, half marathon and marathon routes for runners and riders. Start and finish are on Gosmore village green with course support and a race village.

BigSea on the Isle of Purbeck starts and finishes on Knoll Beach and offers Half Marathon, 18 Mile, Marathon and 54k routes across the Purbeck Hills and coastal landmarks. Aid stations provide snacks, water and vegan options and PH 1000 ele..

A forest trail event at Wendover Woods offering a hilly multi-lap 10 km course with Half Marathon, 10k and Junior Run options, on-site facilities for spectators, route maps and GPX files, and medals plus free photos for participants.

A backyard ultra at Breakheart Quarry where runners repeat a **6706 metre** loop every hour until one person remains; the event includes camping, marked trails and on course support in the Cotswold countryside.

A multi-distance trail event around the Cotswolds from a Cirencester basecamp on 12 to 13 June 2027. Distances range from 10 km to 100 km with staffed rest stops, GPS tracking, camping, medical support and finisher kit.

An urban ultramarathon from a central London Run HQ with three distances including a 100km route that visits 100 plus landmarks. The event emphasises accessibility, on-course checkpoints, medals and a Top 100 finishers list.

Multi distance running event at Warren Farm near Cheddar Gorge on 13 June 2027. Routes follow gorge cliff tops and the Mendip Hills, including Beacon Batch views.

Community 5k, 10k and junior races in Robertsbridge on a multi terrain, undulating course with volunteer marshals, a BBQ, post-race bar, bespoke medals and free parking.

Race to the King is a trail ultramarathon at West Dean Gardens on 19 June 2027, offering 30 km and 50 km loop options plus 80 km and 100 km non stop circuits across the South Downs Way and Monarchs Way with timed results and support.

A Pretty Muddy 5k at The Downs in Bristol with grass start and finish, mixed terrain and obstacles to climb, crawl and slide. Staggered wave starts apply and the event supports Cancer Research UK with a minimum fundraising target.

A muddy 5k obstacle course around The Common in Southampton where participants climb, crawl and slide through obstacles while raising funds for cancer research. Waves run every 15 minutes and participants must be 13 or older.

A trail half marathon at the National Trust Dunstable Downs on 21 June 2026, covering 21.2 km with roughly 450 m of climb. The course is waymarked and supported with aid stations at 6.7 km and 13.7 km.

A women's ultra trail event in the Surrey Hills with out and back routes from Denbies Wine Estate. Three course options, no cut-off times on course, and policies to support pregnant and parenting participants.