Trail Running Calendar South East (England) 2025-2026

The Thursley Common 10km is a scenic trail running event held at Thursley National Nature Reserve in Surrey, one of the largest heathland areas in the region. The 10km course is notably flat, making it ideal for trail running beginners and those seeking a relaxed group run experience. Participants e..

BigHeat Trails (FIRE) is the third event in the Classic Element Trail Series, held at Rother College in Midhurst, Surrey. Inspired by the element of fire, this trail running event offers two challenging single-lap distances: a marathon and a 16-mile run. The course features winding dusty tracks, sun..

Maidenhead Trail Run, part of RunThrough UK, takes place at Summerleaze Park in Maidenhead. The event offers 5K, 10K and Half Marathon on a flat, soft-trail course that loops through tranquil paths beside Maidenhead and Cookham Commons and around Summerleaze Lake. It’s pitched as a relaxed, scenic r..

The North Downs 50 Ultra Challenge is a premier endurance event held in the Surrey Hills, starting and finishing at Loseley Park, Guildford. Participants can choose from 50km, 25km, or 10km looped routes that showcase the scenic North Downs Way and surrounding countryside, offering varied terrain an..

The Windsor Trail Run will take place in Windsor on Sunday 30 August 2026. You can run between 10 and 21 kilometers.

Set along the River Thames at Temple Island Meadows, Henley-on-Thames, the Henley River Half Marathon, 10K & Junior Race from RunThrough UK offers a late-summer Riverside challenge. The event features three distances: half marathon (the route includes a mini lap plus two laps), 10K (one lap), and a..

The Silent Pool 10km is a guided trail running event starting and finishing at the scenic and historic Silent Pool near Guildford, Surrey. The route features beautiful trails including parts of the North Downs Way, the forest of Netley Heath, and the picturesque village of Shere, known for film loca..

The South Downs 100 mile (Autumn Event) is a challenging single-loop trail race held in the scenic South Downs National Park, starting at Plumpton Racecourse in Lewes, East Sussex. Covering 100 miles with over 12,000 feet of elevation, the course features rolling hills and stunning views, supported..

The North Downs Way Ultra Run is a 30-mile guided trail run starting and finishing at St Martha's Hill in Guildford, Surrey. It showcases some of the best sections of the North Downs Way and surrounding Surrey Hills, including the famous Box Hill and Denbies Wine Estate. Designed for first-time ultr..

Take on a picturesque autumn challenge at Windsor Trail Run on Sunday 8 November 2026. Set in royal Berkshire, this RunThrough event offers a Half Marathon and 10K on a flat, off-road trail course beginning and finishing near Alexandra Gardens. Located in royal Berkshire, the route offers royal view..

The Devil's Punchbowl 10km is a guided trail run held in the stunning natural amphitheatre of the Devil's Punchbowl, located in Hindhead, Surrey. This scenic 10km route features challenging hills and beautiful trails, offering runners spectacular views from the top. Designed for both newcomers to tr..

The Serpent Trail Ultra Run is a 30-mile trail running event starting and finishing in Haslemere, Surrey. It showcases some of the best sections of the Serpent Trail and the Sussex Border Path, featuring diverse terrain including hills, ancient woodlands, lush fields, rare heathland, and scenic vall..

The Box Hill Vertical KM is a challenging guided trail run located in Box Hill, Dorking, Surrey. Covering approximately 12.5 miles with around 1000 meters of elevation gain, the route explores hilly woodland, heathland, and open fields, featuring technical climbs that may require scrambling. Designe..