Trail Running calendar near Brentwood 2026-2027

Experience a 52 mile journey through the South Downs National Park with 7000 feet of ascent. This two day event features six checkpoints and full catering including a mid race meal and breakfast at the finish.

The Richmond Park Half and Full Marathon are on August 23, 2026, in Richmond Park. The course includes park trails and landmarks, with goody bags for finishers. This UK Athletics affiliated event has limited entries.

The Trail Trot, formerly The Rings, returns with four scenic distances on the South Downs. Starting at Lancing College, routes mix light trails and pathways, offering views from Lancing Ring to Chanctonbury. The event features full support..

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.

Experience a scenic trail run entirely within the beautiful grounds of Richmond Park. Choose between a half marathon or full marathon distance featuring lake views and wooded paths through this historic Royal Park.

Experience a trail run through the meadows along the Colne Valley Path. Choose between a full marathon or half marathon distance starting from Stambourne Village Hall.

A last person standing backyard ultra at Gosfield School in Essex where runners repeat *4.167-mile* loops each hour until one runner remains. The event includes camping, showers, a small aid station and a prize for the winner.

Test your endurance at Frylands Wood by running four miles every hour until only one runner remains. Enjoy full support with on site facilities, refreshments, and a dedicated rest area as you push your limits.

Take on a legendary mud run in the Surrey countryside featuring over 100 obstacles across a permanent assault course. Choose from 5km, 7km, or 10km distances for an unforgettable test of endurance and teamwork.

Experience a flat trail run through the scenic Alexandra Gardens with stunning views of Windsor Castle. Choose between 10k and half marathon distances with chip timing and free race photos included in a historic UK setting.

Take on the Muntjac 15, a 15 mile trail around Danbury Essex with 1600 ft of climbing across scenic woodland and technical singletrack. Enjoy a well stocked checkpoint, a quality memento and bespoke local trophies.

Experience a scenic out and back trail run through the North Downs Way and Surrey countryside. Choose between a full or half marathon starting from the grounds of Woldingham School.

Experience a scenic trail run through the grounds of Shoreham Woods in Kent. This chip timed 10k event features woodland paths and supports the local environment and dementia research.

MacTuffX Bedford features a series of repeat interval races in solo, doubles, and relay formats. Participants aged 18 and over can choose between 400m and 800m intervals to test their endurance.

Experience an evening trail run through the meadows and woodlands of the historic Ickworth National Trust estate. Choose between 5km and 10km routes featuring a beautiful sunset backdrop and a finish at the iconic rotunda.

Experience a scenic run along the River Thames starting from the iconic Temple Island Meadows. Choose from a half marathon, 10k, or junior race featuring undulating trails and professional chip timing.

Explore the South Downs National Park on a supported 100 km, 50 km, or 25 km journey from Eastbourne to Arundel. Walk, jog, or run past the Seven Sisters and Beachy Head with full hospitality and rest stops included.

Join a fun muddy obstacle course in Brentwood featuring 5km and 1.5km distances filled with foam and obstacles. Enjoy a non competitive atmosphere with hot wash downs and finisher medals for all participants.

Enjoy a flat and fast riverside run along the Thames in Walton on Thames. This social event offers marathon and half marathon distances on a scenic towpath with chip timing and finisher medals for all participants.

Nuclear Mud Sisters is an empowering women only obstacle course in Essex featuring a 5km muddy challenge. This non competitive event focuses on teamwork and fun with no chip timing or swimming required.