Trail Running calendar near Harwell 2026-2027

Trail running on 13 June 2026 at Wilkswood Farm near Swanage, Dorset. Three waymarked routes of 23 km, 13 km and 7 km follow coastal terrain with outposts on the middle and half routes and a four hour finish guideline.

An inflatable obstacle course at East Brighton Park on Saturday 13 June 2026 offering 2.5 km, 5 km, 10 km and 15 km options with repeated 2.5 km laps, multiple obstacles and family and group ticket options.

A timed multi-lap event on a flat 5.3 km out and back towpath course along the Thames offering distances from 5 km up to ultra with flexible start times, themed ducky incentives and a large spinning medal for finishers.

Test your endurance at MacTuffX London in Barking. Choose from solo, doubles, or relay categories with interval distances of 10x400m or 10x800m. This event is open to all participants aged 18 and over.

Pretty Muddy 5k at Sandwell Valley Country Park on 13 June 2026 is a muddy obstacle course with staggered wave starts and a minimum fundraising target. Facilities include toilets and refreshments but it is not wheelchair accessible.

An evening trail run at Bodenham Arboretum offering 5km or 10km routes over multi-terrain, raising funds for local charities with limited online-only entries and basic on-site facilities.

A fell race held since 1986 at The Whistle Inn near Garn yr Erw, Blaenavon, with an 8 km/300 m ascent option and a 5/984 ft option. Entries are accepted on the day or online and runners should carry appropriate safety kit.

A backyard ultra at Breakheart Quarry in the Cotswolds where runners repeat a 6706 m loop every hour until one person remains. Camping and on-site facilities are provided; early bird entry is £75.

Trail runs through Cheddar Gorge and the Mendip Hills on 14 June 2026, with distances from 1 km to marathon. Routes are waymarked and marshalled, with multiple feed stations and on site parking.

Trail races in Kingsclere, Hampshire on Sunday 14 June 2026 with marathon, half marathon and 10k on clearly marked single-lap off-road courses. Marshals are stationed along the routes and parking is available nearby.

A 10 km trail race on the private Lulworth Estate in south Dorset, combining a village fête atmosphere with a scenic, hilly course on chalk downland and woodland paths. Proceeds benefit the Coombe Keynes Trust.

Run as many 3.28 mile laps as you wish along the scenic Stroud Waterways canal. This flexible timed event caters to all distances from 5k to ultra marathon with a seven hour time limit and a relaxed start window.

WildRox brings a test of strength and endurance to the Huntley Estate in Gloucestershire. Complete eight physical challenges and eight kilometers of off road running to earn your finisher medal and official time.

A rural 5 km family fun run and walk in Long Wittenham on 14 June 2026, on signed and marshalled footpaths through Neptune and Paradise Wood. There are age category awards, a midway drinks station, refreshments and a fastest villager prize.

Race 3 of the Northants 5 km Series runs near Silverstone at Blackpit Farm on Wednesday 17th June. The multi terrain course passes woodlands, lakeside lawns and farmland and all finishers receive a bespoke 5 km medal.

A category A fell race inside the M25 on 19 June 2026, with multiple climbs around Yardley Valley and a finish on Pole Hill. Entry via SPOND costs £5 and post race refreshments are available at the clubhouse.

Two fully signed trail routes around Richmond Park following parts of the Capital Ring. Choose a 55 km ultra or a 25 km trail, with route support, training support from Beyond Trails and an accessible start and finish.

Point to point trail races on Saturday 20 June 2026 with a 50 mile ultra and a marathon across Bucks Beds and Northants along the Three Shires Way. Coach transfers, checkpoints and licensed race support are provided.

Timed 6, 12 and 24 hour trail races around a 2.5 km loop at Leybourne Lakes Country Park on 20 to 21 June 2026. Solo and relay formats, live timing, medals and a race village with food and medical support.

A looped trail event at Denbies Wine Estate offering a 100 mile ultra with up to 30 hours to finish, chip timing, on-course aid and multiple concurrent distance options including marathons and timed events.