Trail Running calendar near Boreham 2026-2027

A Pretty Muddy 5k obstacle event at Fairlands Valley Park with mixed terrain, staggered wave starts and on-site facilities. Participants must be 13 or older and receive event support plus a finisher medal.

Oaks Trail at Rivenhall Oaks golf centre on 05 Jul 2026 offers two unmarked routes of about 6.5 or 3.5 miles, with entry fees split by England Athletics affiliation and proceeds donated to Essex and Herts Air Ambulance Trust.

An evening 10 km trail run through Thursley National Nature Reserve, crossing heathland, bog and woodland and featuring the boardwalk named Britain's Favourite Path. The event is organised by Running Adventures and is aimed at trail newcome..

Race 4 of the Northants 5K Series takes place at Fermyn Woods Country Park on 8 July 2026, featuring a multi-terrain 5 km route through ancient woodland. Limited paid parking is available and series medals are awarded to finishers.

A 6-hour timed run along the flat Jubilee River in Slough on July 9, 2026. Participants complete laps of 5.24 miles, choosing their own distance. Every finisher gets a medal.

A seven hour timed event on a looped course beside the River Thames on 10 July 2026. Runners can choose distances from 3 km up to ultra and receive medals, goody bags and on course aid.

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; transfers allowed until 06/07/2026, and competitors must be 16 or over.

A 24 hour multi terrain relay or solo race near Romford where competitors run repeated 5.75 mile laps in teams of two to eight, with one runner on course per team; camping and event services are available on site.

Follow Britains oldest trail through 5000 years of history on the Ridgeway. Choose between 50km or 100km distances and finish at the iconic Avebury Standing Stones with full medical and snack support.

Trail running event at Princes Risborough across the Chiltern Hills offering distances from 8 km to 50 km. Routes run through beech woodland and ridgelines with outposts offering snacks and self-serve water.

LDWA Norfolk & Suffolk's Rodent Wriggle offers three scenic routes (13.5, 23 and 31.5 miles) from Needham Market Community Centre with checkpoints, refreshments and a finisher's certificate; entries are limited and must be prebooked.

Timed 6 hour, 12 hour and 24 hour events on a flat scenic Backyard route in Thetford Forest. Options for solo runners, pairs or teams up to four with on site camping, basic food provision and trophies for winners.

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 morning trail run through the Chiltern Hills covering 10 km from Church Farm Cafe, Aldbury, with Run Leaders, trail instruction and bag storage. Entry is limited to 50 places and tickets are £23.

MacTuffX Peterborough offers a unique interval based competition for adults. Choose between solo, doubles, or relay formats featuring 400m and 800m repetitions for a focused fitness test.

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 5k obstacle course through Abington Park on 11 July 2026 featuring climbing, crawling and sliding obstacles. The event uses staggered wave starts, has a minimum fundraising target and limited accessibility for wheelchair users.

A muddy 5k obstacle course at Beckenham Place Park where participants climb, crawl and slide across grass and paths with steep inclines. Open to ages 13 and over with a published fundraising target and event facilities on site.

Trail running at Bawsey Country Park on 12 July 2026 with distances from 5k to ultra marathon, timed laps and aid stations. Parking is included and finishers receive a bespoke medal; virtual entries are available.