Trail Running calendar near Brentwood 2026-2027

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.

About 52 miles across the South Downs National Park, a circular challenge from Plumpton Agricultural College visiting Lewes, Glynde and Alfriston with about 7,000 feet of ascent.

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.

A trail half marathon from Creasey Park across the Dunstable Downs, run mainly on footpaths and bridleways. The self navigated course includes checkpoints and guide runners, a GPX file, on course drink stations and event facilities.

A **7.5 km** mostly off road trail loop around Ticehurst with marked and marshalled course, limited entries, prizes and tea and cake after the race.

A timed, multi-distance event at Ardingly Reservoir with lap-based 7 km out-and-back course, a seven hour limit and flexible start window; finishers receive a donut medal and a no-medal entry option is available.

Two self-navigation trail races in Chelmsford on 23 August 2026: the hilly Admiral McHilly Trail of about 16 miles and the flatter Chelmer Trail of about 6 miles, with written route instructions and no course markings.

Guided group trail run of 10 km through High Lodge in Thetford Forest, led at a conversational pace with groups based on ability. Mostly flat woodland terrain, trail shoes recommended; parking costs £3 and the entry fee is £12.50.

A last man standing backyard ultra on a 4.167 mile loop in the grounds of Gosfield School, Essex. Runners repeat the loop on the hour until one remains; the event includes camping, showers, a small aid station and a £150 winner prize.

London Backyard Ultra is a loop race where runners complete a four mile loop each hour until one runner remains. It takes place at Frylands Wood Scout Outdoor Centre on 29 August 2026 and includes pitches, showers, and race photography.

An obstacle mud run on a permanent assault course near Dorking, Surrey, offering 5 km and 10 km options, multiple laps, and entries for solo runners, teams and charities. The course includes mud, water, walls and climbing obstacles.

30 August 2026 in Alexandra Gardens Windsor offers 10K and half marathon routes with views of Windsor Castle. The event includes chip timing, free race photos and an event village.

A 15-mile trail race near Danbury on 30/08/2026 featuring 1600 ft+ of ascent, technical singletrack, locally made trophies and cash prizes including a course-record bonus.