Trail Running calendar near Brentwood 2026-2027

A half marathon and 10K through Epping Forest, London on 10 October 2026, run on marked woodland trails with aid stations, chip timing and an eco friendly focus.

A military‑inspired obstacle mud run at Hever Castle on 10–11 October 2026, offering **3K**, **6K**, and **12K** courses, obstacles modelled on Royal Marines training, a survival experience, and an event village with music and attractions.

Road and trail races in the Chiltern Hills on 11 October 2026 offering 5 km and 10 km routes with woodland paths, country lanes and notable climbs.

A 20 mile looped trail that starts and finishes inside the 18th Century Landguard Fort in Felixstowe. The route crosses two nature reserves, two river estuaries and the Port, and is open to participants aged 18 or older.

The Titsey Trail 10k is a community running event held on Sunday, 11th October 2026. Organized by runners for runners, it raises funds for a variety of local charities.

Fully marked trail races at Grafham Water on 11 October 2026 offering a 10k and a half marathon around the reservoir, with GPX routes, water stations, first aid cover, medals and prizes for top finishers.

FOOBS Trail and Fun Runs on 11 October 2026 offers chip timed 10K and 6K trail races plus a 2K fun run at Old Basing and Lychpit Recreation Ground. Proceeds support Friends of Old Basing Schools.

A single-lap 10K on 11 October 2026 around Burnham on Crouch, featuring sea wall coastal paths and countryside trails. The event is based at Dengie Hundred Sports Centre with free parking, facilities and post-run food and drink.

A circular half marathon at High Lodge, Thetford Forest featuring mixed hard-packed trails, wildlife, cupless water stations and podium prizes.

Community organised *5k* near Aldershot on Sunday 11 October 2026 with a very flat route on the Polo Fields and Basingstoke Canal towpath, chip timing, a bespoke finisher medal, and a subsidised race t shirt option.

A 10 km undulating multi-terrain race from Buckingham Town Centre through Stowe National Trust gardens and countryside, with medals for finishers and local charities supported.

A scenic approximate 15 km trail race in Tring on 11 October 2026, routed through Ashridge Estate, the Ridgeway and Pitstone Hill with water stations and finish facilities.

A lap-based out and back run along the Thames in Walton on Thames offering distances from a single 5.3 km lap up to ultra distances with a seven hour limit.

A lap based Friday timed run on a flat 5.3 km out and back course along the river Thames, with distances from 5 km up to ultra. Both attended and virtual entrants receive a finisher medal.

A 100 mile trail race from Goring and Streatley run as four 25 mile out and back spurs on the Ridgeway and Thames Path. The event features 16 aid stations, medical support, strict qualifying standards and a 28 hour cut off.

Annual 25 km and 50 km routed challenge across Kent, Surrey and Sussex with checkpointed support, food included and GPX route files provided.

A guided 10-mile trail run through the Chilterns along canals, reservoirs and past Britain’s oldest post windmill; includes trail technique coaching and a finisher’s medal for 2026. On-site parking and a 15 minute walk from the station.

A lap-based timed run at Old Warden on a flat 5.3 km course with flexible distances, a 7 hour limit, and a no-medal lower cost option.

An off-road 10 km through undulating bridle paths and woodland around Westacre, Norfolk, featuring optional obstacles, a ford crossing near the finish, on-site registration, a water point at 5 km, refreshments and a bespoke medal for all en..

Woodland half marathon and 10k at Bedgebury National Pinetum in Kent on 18 October 2026, with traffic-free forest trails, downloadable GPX maps, medals, free photos and limited free parking.