Trail Running calendar near Brentwood 2025-2026

The Admiral McHilly Trail is a challenging trail running event held in Chelmsford, Essex, featuring an approximately 15-mile course with significant elevation, including over 900 feet of climbing and descent concentrated in the middle section. The race follows a self-navigation format using a writte..

The Windsor & Eton 10km is a scenic multi-terrain running event held near the River Thames in Windsor, starting and finishing close to the Windsor & Eton Brewery. The course is mostly flat, covering 50% off-road paths including towpaths, footpaths, and some short road sections through areas like Bat..

The Firle 5km Handicap Trail Race is a scenic running event held at Firle Village Hall in the UK. This 5km out-and-back trail run features an undulating course primarily on The Old Coach Road track, offering beautiful views of the South Downs. The route is about 90% trail and 10% quiet country lane..

The Gosfield Backyard Ultra is a unique endurance running event held at Gosfield School in Essex, UK. Participants run a 4.167-mile (6,706 meters) loop every hour on the hour, continuing until only one runner remains. The course is fully marked and set within the scenic grounds of the school.The eve..

The Woldingham Marathon, held near Caterham, UK, offers both full (26.2 miles) and half marathon (13.1 miles) distances on an out-and-back course starting at Woldingham School. The route features a scenic mix of private roads, green valleys, wooded trails, and countryside views across Kent and Surre..

Trail Run Canterbury is a scenic trail running event held around the outskirts of Canterbury, starting from St. Edmund's School. The event offers three distance options: 5.5 miles, 10 miles, and 20 miles, with the longest being two loops of the 10-mile course.Runners experience a mix of open country..

The Chelmsford Brew Co Summer August Ale Trail 10K is a fun, charity-focused running event held at Brewery Fields, Great Baddow, Chelmsford. Scheduled for August 28, 2025, the 10K course is a GPX/Strava route with a narrative guide, emphasizing enjoyment over competition. Participants receive a drin..

The London Backyard Ultra is a unique endurance running event held at Frylands Wood Scout Outdoor Centre in Croydon, London. Participants run a four-mile loop every hour on the hour, continuing until only one runner remains, testing their true limits. The event offers a challenging yet supportive at..

The White Cliffs Challenge is a 51-mile endurance event starting from Betteshanger Sports & Social Club in Deal, Kent. The route showcases the stunning White Cliffs coastline, extending beyond Dover, then follows the North Downs Way, passes through the scenic Elham Valley, and traverses the rolling..

The Henley River Half Marathon, 10k & Juniors event takes place in Henley-on-Thames, UK, on August 30, 2025. This scenic trail run is suitable for both new and experienced runners, featuring routes around Henley-on-Thames with views starting and finishing at Temple Island Meadows, the Royal Henley R..

The 2nd Galloping Grind 10k Trail Run takes place in Boreham, Essex, at Orchards, Damases Lane. This dusk race features a predominantly anti-clockwise trail course, with a new route introduced for 2025. Participants are advised to wear high-visibility or reflective clothing and carry mobile phones f..

The Ickworth Sunset Chase is a scenic running event held at Ickworth Park, a National Trust estate near Bury St Edmunds, Suffolk. Offering 5K and 10K distances, the race starts at sunset, guiding runners through landscaped parkland, meadows, forests, and rolling countryside. The course features mult..

The Shere 42k, 21k & 10k Multi Terrain Event is a trail running series held in the scenic Surrey Hills, an Area of Outstanding Natural Beauty. The event offers three distances: a 10k route with 123m ascent through woodlands, a new 21k half marathon featuring parts of the North Downs and Ranmore with..

The South Coast Challenge will take place in Eastbourne on Saturday 6 September 2025. You can run between 16 and 63 miles.

The St Albans Stampede - 12hr Enduro is an ultra marathon held in the scenic Hertfordshire countryside, featuring parts of Heartwood Forest and Nomansland Common. Participants aim to cover the greatest distance by running multiple four-mile loops within a 12-hour period. The event accommodates solo..

The Bradenham Blast is a highly regarded trail running event held in the scenic Chiltern Hills at Manor Farm, Bradenham, UK. It offers three distances: 5km, 10km, and a new half marathon, catering to runners of all abilities. The course features challenging hills, tranquil beech woodlands, rugged tr..

The Muntjac 15 is a trail running event held on September 7, 2025, featuring a 15-mile course that connects five beautiful woodlands. This race is ideal for runners who enjoy hilly terrain, wooded areas, and single-track trails, offering a scenic and challenging experience. With a limited number of..

The Sufferings is a challenging trail running event held at Washington Village Hall in Pulborough, UK. The race features three distances: a half marathon, a full marathon, and a 39-mile ultra, all incorporating the toughest tracks of the Chanctonbury and Cissbury rings. Participants face significant..

The Farnham Pilgrim Marathon, held in Farnham, Surrey, offers runners a scenic and challenging trail experience through the Surrey Hills. The event features a full marathon distance with spectacular views and a course that is mainly off-road, multi-terrain, and hilly, making it one of the tougher bu..

The SOX 10km is a scenic multi-terrain running event held in South Oxfordshire, starting and finishing at the South Oxfordshire Brewery taproom. The course covers 10 kilometers with about 60% off-road terrain, including trails, woodlands, fields, and local roads, offering stunning countryside views...