Trail Running calendar near Staines-upon-Thames 2026-2027

A flat 10 km trail run through the 325 hectare Thursley National Nature Reserve, featuring a recognised boardwalk and abundant wildlife. Suited to newcomers to trail running and runners seeking a social evening run.

A multi-terrain 5km in Fermyn Woods Country Park on Wednesday 8th July, part of the Northants 5K Series. Limited parking, bespoke finishers medals and a virtual completion option are available; entries close 23:59 on Tuesday 7th July.

An off‑road two-lap race through Hainault Forest organised by Ilford Athletic Club on 8 July 2026, supporting St. Francis Hospice and forming Leg 5 of the Elvis Grand Prix.

A measured off road 5K held as Race 4 of the Crown to Crown 2026 series at Westley Heights Country Park on 8 July. The course uses bridleways and some tarmac, with TRA licensing and on course marshals and first aid.

The Phoenix Running - Slough will take place in Slough on Thursday 9 July 2026. You can run 5 miles.

A 10 km off road trail race at Trifarm in Boreham, the first event in the 2026 Trifarm trail series. The route is mostly on public footpaths and bridleways, runs anticlockwise, and has a tail walker but no water stations.

A 7 hour timed event on a signed loop along the River Thames in Egham, with flexible self-directed distances from 3 km up to ultra and 50 km options. Finishers receive medals, goody bags and distance pins for longer distances.

Phoenix Fridays offers a flexible Friday run with a "rock up and go" start. Choose your distance on a flat, timed 5.3km loop along the Thames towpath. All finishers can pick from a selection of signature medals.

Hazelbury Hurrah! is a multi terrain running event in Corsham on 10 July 2026 with a main six mile course and a 2 km junior race. The race is Trail Running Association licensed and supports local charities.

A 24-hour multi-terrain relay or solo race near RM13 with teams of 2 to 8, repeated 5.75 mile laps, free camping and on-site catering, showers and first aid. Entry fees are published from £89 to £110.

A trail ultramarathon from Lewknor to Avebury in Oxfordshire with 100 km and two 50 km stage options, following the Ridgeway through historic sites and offering pit stops, chip timing and basecamp facilities.

A fun run on an inflatable obstacle course in Southampton on 11 July 2026, with distances from 2.5k to 15k, music zones, on-course water, and a finisher's medal for participants.

Trail races from 8 km up to a 50 km ultra around Princes Risborough, using ancient beech woods, chalk downs and Ridgeway sections with marked routes and fuel outposts.

Enjoy a flexible timed running event along the flat River Thames towpath. Choose your distance from 5km to an ultra marathon and earn a bespoke spinning medal on this fast riverside course.

Explore the scenic trails of the Chiltern Hills during this guided 10km summer run. Led by experienced guides, participants enjoy local history and trail running tips in a social and group-focused environment.

A lap based timed run at Mowsbury Park on 11 July 2026 offering distances from 5 km up to ultra with a flexible one hour start window and a choice of medal or lower cost no medal entry. Places are limited to 75.

A muddy 5k obstacle course through Abington Park in Northampton on 11 July 2026, organised by Cancer Research UK. Waves run every 15 minutes, participants must be aged 13 or older, and on site facilities include toilets and refreshments.

A muddy 5k obstacle event at Beckenham Place Park with climbing, crawling and sliding on a grassy, undulating course. Waves start every 15 minutes; participants must be 13 or older and fundraising supports Cancer Research UK.

Running Wild 2026 is a muddy 5K obstacle course through Wild Forest near Brentwood on 11 July 2026. Open to ages 13 and over, it includes water features, climbing and a large slide into a lake, with a medal and post race shower.

Ultra:5K in Kempston on 12 July 2026 features three lap formats of consecutive 5 km circuits on an off-road course with hills and twists. Entries include between-lap sports massage, refreshments and a bespoke finisher medal.