Trail Running Calendar London 2025-2026

The Horton Country Park Summer Series 2025 is the third of four evening orienteering events organized by MVOC, held at Horton Country Park near Chessington, UK. It offers a welcoming atmosphere for runners of all abilities, featuring a 60-minute score course with an odds & evens format for experienc..

Clissold Park hosts a penultimate event in the Park Race series organized by Dartford Orienteers, set in largely open parkland featuring a mansion, lakes, a water fountain, skateboarding area, and adventure playground. The event offers two courses: a 2.5 km short course and a 5.0 km long course, wit..

Stately Trails: Aske is a scenic running event held at Aske Hall, a Georgian country house near Richmond, North Yorkshire. Participants can choose between 5km and 10km trail races, or a 5km walk, all set within the exclusive estate's beautiful grounds featuring parkland, woodland, pasture fields, an..

The Kennet & Avon Canal 145 Mile Race (KACR) is a challenging non-stop ultramarathon held in the UK, running from Little Venice, London, to Bristol. Covering 145 miles, the route follows easy-to-navigate canal, river, and railway towpaths, including the Grand Union Canal, Jubilee River, River Thames..

The Round the Rock will take place in Morden on Saturday 2 August 2025. You can run 46 miles.

The Orion Harriers Forest Five Series is a running event held at Jubilee Retreat, featuring a 5-mile race through forest terrain. Established in 2009 to support the Orion Harriers clubhouse, the 2025 series includes three races on Saturday mornings in June, July, and August. The third race also serv..

The Vanguard Way Marathon is a scenic running event held near Croydon, starting from East Croydon Station, just 20 minutes from central London. It offers both a full marathon (26.2 miles) and a half marathon (13.1 miles), following part of the Vanguard Way National Trail, a 66-mile route stretching..

The Ivybridge 3 Tops is a challenging fell running event held in Dartmoor, organized by Erme Valley Harriers as part of the Dartmoor Fell Series. The race covers approximately 10 kilometers with 450 meters of climbing, offering stunning views over the South Hams. The course features a brisk start up..

The Thames Meander Summer is a scenic riverside running event held in Richmond, starting at the Petersham & Ham Sea Scouts HQ. It features three fast, flat, and well-marked out-and-back trail routes along the Thames Path: a 10km (one 6.25-mile lap), a half marathon (two 6.55-mile laps), and a marath..

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 Thames Path Ultra Challenge is a premier endurance event in England, following the scenic Thames Tow Path from Putney Bridge in London to Henley-on-Thames. Participants can walk, jog, or run distances ranging from 10 km to a full 100 km ultra, with options for 75 km, 50 km, and 25 km as well. Th..

The Run London Epping Forest Trail 10k is a popular running event scheduled for September 14, 2025, in the scenic Epping Forest, Chingford. Participants will complete a 10k course consisting of two laps through the forest, known for its rich biodiversity and beautiful landscapes. The race is designe..

The Epic Epping Forest Ultra, organized by Orion Harriers, is a challenging trail running event held in Epping Forest, London. The 2025 edition features a 50-mile ultra race consisting of 10 laps of a 5-mile forest trail loop with 3,680 feet of elevation gain. The course is marked with sawdust and f..

The Richmond Park Half Marathon is a scenic trail run covering a half marathon distance entirely within Richmond Park. The event begins at Sheen Gate, where participants will navigate through picturesque routes, including views of lakes and wildlife. Runners will traverse various park gates, includi..

The London Epping Forest 50 Km will take place in London on Saturday 4 October 2025. You can run 50 kilometers.

The Thames Meander Autumn is a scenic riverside running event held in Richmond, starting and finishing at the Petersham & Ham Sea Scouts HQ. It offers three race distances: 10km, half marathon, and marathon, all following flat, fast, and well-marked out-and-back routes along the Thames Path towpath...

The RunUk Kingston 10k is a scenic running event starting and finishing at the Kingston Hawker Centre in Surrey. The course takes runners through the streets of Kingston and along the picturesque river towpath, offering a vibrant atmosphere supported by local organizations. Participants receive a fi..

The Centurion Thames Path 100® is a 100-mile marked point-to-point trail race from Richmond in London to Oxford University grounds. The course follows the Thames Path, offering a flat and fast route mostly on groomed trails and paved paths, showcasing stunning English riverside scenery. Runners face..