Trail Running calendar near London 2026-2027

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.

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

A mostly off road 10 km trail at Trifarm, Boreham on 09 Jul 2026, run on public footpaths and bridleways with on-site parking, numbered registration at the entrance, and a finish around the lake running track.

A 7 hour timed event on a signed Thames loop at Wraysbury Skiff & Punting Club in Egham where runners choose distances from 3 km upward. Medals, goody bags and aid station support are provided with age and distance rules in place.

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.

A roughly five mile off road trail run at High Lodge Thetford Forest with chipped timing and a finishers medal. Entries are non refundable but transfers to another runner are allowed until 06/07/2026.

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.

An outdoor inflatable obstacle run on a 2.5 km lap with options of 2.5k, 5k, 10k and 15k. The event features giant inflatables, music zones, on-course water, a finisher's medal and on-site food vendors.

Trail running event on 11 July 2026 from Princes Risborough into the Chiltern Hills, offering routes from 8 km to 50 km across beech woods, ridgelines and chalk downs with marked outposts and timed results.

Three measured routes through Mid Suffolk countryside on 11 July 2026, including a 31.5 mile option that passes 10 historic churches. Shorter routes branch off the main course and rejoin for a common finish with checkpoints and refreshments..

Timed non stop runs of 6, 12 or 24 hours on the Backyard route at High Lodge Thetford Forest. Enter solo, as a pair or a team of up to four; camping onsite, timing by Timing Monkey and a bespoke wooden medal for all.

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.

A guided 10 km trail run in the Chiltern Hills with run leaders who provide trail running tips and local history stops. Based at Church Farm Cafe in Aldbury, the event offers on-site parking, bag storage and a cani cross dog option.

MacTuffX Peterborough on 11 July 2026 at the Embankment offers Solo Doubles and Relay functional fitness races combining ten Xercises with repeated runs. Entrants must be 18 or older.

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.