Trail Running calendar near Hertfordshire 2025-2026

The Gratitude 25km is an exciting running event taking place in Broxbourne, UK. This race is designed for runners of all levels, promoting fitness and community spirit. Participants will enjoy a scenic route while challenging themselves to complete the 25km distance. The event emphasizes the importa..

The ZigZag 2026 Moo-rathon, Calf and Hen K at the Farm is a trail running event held at Hyde Hall Farm, SG9 0RU. Returning for its third year, the event offers multiple distance options including 10k, half marathon, full marathon, and ultra marathon. The course features a mix of tarmac paths, grassl..

Winter's End - 50 Mile Ultra & Marathon is a scenic trail running event held along the South Downs Way National Trail, starting near Arundel, West Sussex, and finishing in Winchester, Hampshire. The event features a 50-mile ultramarathon and two marathon options covering either the first or second h..

The Surrey Hills Half Marathon is a scenic 13-mile guided trail run starting and finishing in Guildford, Surrey. Ideal for those new to trail running, the route showcases the natural beauty of the Surrey Hills, including landmarks like St Martha's Church, the village of Shere, Newlands Corner, and H..

The Windsor Trail Run, held at Alexandra Gardens in Windsor, UK, offers 10K and Half Marathon distances on a flat trail course with well-marked routes and scenic views of Windsor Castle. RunThrough UK promotes a friendly, marshal-led atmosphere within a lively event village that features food and dr..

The Petzl Night Trails 10K at Salcey Forest is a unique night trail running event held near Northampton. Participants run a fully marked, two-lap 10K course on crushed stone paths through the flat but occasionally slippery forest terrain. Runners must use a head or chest torch to navigate the dark t..

The Hankley Common 10km is a guided trail running event held at Hankley Common in Elstead, Surrey. This scenic course features trails through an area rich in rare wildlife and historical landmarks, including the Atlantic Wall replica used for D-Day training. The run offers stunning views and a uniqu..

The Elephant Challenge is a 6-hour running event held at the award-winning Salcey Forest near Northampton, England. Participants run multiple laps of a 3.5-mile off-road loop through well-maintained forest paths, mainly on crushed stone and forest floor, with no asphalt. The event welcomes all abili..

Run the Wild Half Marathon is a trail-focused 21km event set in the Chiltern Hills, starting from The Home Office in Tring, 30 minutes northwest of London. The route climbs roughly 300m and winds across chalk hills and through woodlands, offering stunning scenery rather than a road-race atmosphere...

The Springtide 50k is an ultra running event held in the historic town of Arundel, West Sussex. This single-loop course offers a runnable, non-technical route through the scenic South Downs, making it ideal for beginners and experienced runners alike. Participants enjoy stunning views of rolling hil..

The Zig Zag Challenge is a timed running event held at Brandon Country Park in Suffolk, located in the heart of Thetford Forest. Participants can choose between a 4-hour or 6-hour race, running multiple laps of a 5.3 km multi-terrain course featuring gravel footpaths and grass areas. The event suits..

The Testway Ultra is a challenging ultra marathon held in Hampshire, England, featuring 40 and 50-mile distances along the scenic Testway footpath. The route stretches from the chalky downs near the Northern Hampshire/Berkshire border to the southern town of Totton in Southampton, showcasing picture..

The Mortimer 10km is a scenic trail running event held in the charming Berkshire village of Mortimer, starting and finishing at Mortimer Fairground. The race features a beautiful two-lap, multi-terrain course that covers woodland trails, footpaths, and bridleways with an elevation gain of 85 meters...

Henley River Half Marathon, 10K & Junior Race, organized by RunThrough UK, takes place at Temple Island Meadows, Remenham Lane, Henley-on-Thames. The event offers three distances—the Half Marathon, 10K, and a Junior Race—on a scenic, mixed-terrain course along the River Thames. The route is undulati..

The Rosebud Marathon is a scenic 26.2-mile race held in Northamptonshire, England, featuring a mix of approximately 60% trails and 40% roads. Starting at Hartwell and finishing at Brixworth Country Park near Northampton, the course traverses beautiful countryside, including canal towpaths and 14 vil..

The Rose of the Shires Ultra is a 54-mile circular ultra marathon held in Northamptonshire, starting and finishing at Brixworth Country Park. The course features approximately 70% trails, including country paths, towpaths, and forest tracks, with the remaining 30% on roads. Runners traverse scenic c..

The 50 Mile Grand Slam is a challenging endurance event organized by Centurion Running, comprising four separate 50-mile races held throughout 2026 in the UK. Participants complete the South Downs Way 50, North Downs Way 50, Chiltern Wonderland 50, and Wendover Woods 50. The event covers diverse sce..

Run The Seasons at Cowdray is a scenic trail running event held on the Cowdray Estate in West Sussex, within the South Downs National Park. The 2026 Spring edition features courses of 5km, 10km, 10 miles, and dog-friendly canicross options. The route traverses Ambersham and Heyshott Commons, designa..

The Centurion South Downs Way 50® is a challenging 50-mile ultramarathon held annually in Southern England, starting in Worthing and finishing at Eastbourne Sports Club Athletics Track. The course follows the South Downs Way National Trail, featuring 5,700 feet of elevation gain over 85% trail and 1..

The Haughley Festival of Running, held at the exclusive Haughley Park in Suffolk, offers a variety of race distances including 5k, 10k, Half Marathon, Full Marathon, and Ultra Marathon. Now in its fourth year, this intimate event features a mainly pathway course with some trails and woodland section..