Trail Running calendar near Chelmsford 2026-2027

Race one of the AWT Backyard Ultra Series in Ruislip on 9 August 2026 uses six hourly 5 km laps for a total of 30 km. Entry is free and the event is held in person with free parking.

The Beat the Tide 10Km will take place in Worthing on Thursday 13 August 2026. You can run 10 kilometers.

A 7 hour timed event on a signed riverside loop in Egham offering flexible distance choice from 3 km up to 50 km, medals and goody bags for finishers, aid stations each lap, and distance pins for half-marathon and above.

Two trail ultramarathon options follow the Harborough Round around Market Harborough, with GPX files, multiple aid stations, TRA licensing and a comprehensive mandatory kit list for runners.

A guided 10 km trail run through the Chiltern Hills followed by a brewery tour and tasting at Tring Brewery. Groups are split by ability and participants should be able to run 5 km without stopping.

Special-edition Rat Race obstacle event at Forest Facility near Stamford, featuring a 4 mile loop with about 60 obstacles, family and teen options, and additional on-site activities. Proceeds support Project Jungle rainforest conservation.

Trail event on 16 August 2026 offering a competitive 15 mile run and a timed 15 km social hike. Over 18s only; starters receive a vest or T shirt and finishers get a medal and a free drink.

An off road half marathon around Henfield with sections along a riverbank and disused railway, featuring flint paths and stiles. The event provides changing rooms showers free parking and medals for all finishers.

An evening *10 km* trail run with a published Strava route, limited entry and an event T shirt included. Race numbers are issued on the day, manual timing may be used and results are posted within 48 hours.

Seven hour timed run on a signed River Thames loop near Egham with flexible start options, medals from 3 km, goody bags including a vegan option, aid tables each lap and distance pins for half marathon or longer.

Trail races at Wendover Woods feature a half marathon, 10k, 5k and junior race across steep woodland with 181 m of climb. Entries include a themed medal, free photos, chip timing and post race goodies.

A 52 mile LDWA event across the South Downs National Park with 7,000 ft of ascent to be completed within 23 hours, starting and finishing at Plumpton College and visiting a sequence of villages and seven staffed checkpoints.

A ten day running series in Walton on Thames from 22 to 31 August 2026 offering daily themed rubber ducks and ten giant spinning ducky medals, with distances from 5 km to ultra and certified out-and-back routes along the Thames towpath.

The La Boucle des 2 Caps will take place in Wissant on Saturday 22 August 2026. You can run between 7 and 54 kilometers.

The Seven Sisters 10K Run/Walk will take place in Birling Gap on Saturday 22 August 2026. You can run 10 kilometers.

Combined half and full marathons run through Richmond Park on 23 August 2026, using a lap route from Sheen Gate that follows the Tamsin Trail with aid stations and finishers receiving a medal, mug and buff.

A South Downs trail running event based at Lancing College offering 5K, 10K, Marathon and 50K routes across grassy trails, chalk paths and ridgelines, with marked, chip-timed courses and aid stations.

Experience a scenic run through the historic Richmond Park on this UK Athletics Affiliated course. Choose between a half or full marathon distance following the trails and private roads of London’s largest Royal Park.

A trail run entirely within Richmond Park offering half marathon and marathon distances, a route past the White House and park lakes, and on-course drinks and feed stations.

A self navigation trail event along the Colne Valley Path with marathon and half marathon distances, stocked aid stations, cupless arrangements, a pre-race shuttle and optional medal choices.