Trail Running calendar near London 2025-2026

North Chilterns 50K is a 50-kilometre trail ultra starting from the Putteridge Bury Estate near Luton. The route climbs 798m+ across the North Chilterns, offering undulating ridgelines and viewpoints at Warden Hill and Barton & Pegsdon Hills. Runners follow the Chiltern Way toward Lilley, out to War..

The ATW Holdenby House Trail & Canicross event takes place on the historic 2,000-acre Holdenby Estate in Northamptonshire, featuring a scenic 5.4 km traffic-free trail through estate grounds and surrounding farmland. Participants can choose from 5k, 10k, or half marathon distances, with laps corresp..

The Marlow Donkey is Thames Valley LDWA’s two-route challenge walk based at Liston Hall, Marlow, in Buckinghamshire. Entrants may tackle 16 miles or 25 miles, within maximum time limits of 8 or 9.5 hours respectively. The walk winds through the Chiltern Hills, with a new year’s route featuring a fig..

The Frieth Hilly 5km & 10km is a challenging mixed-terrain running event held in the scenic Chiltern Hills near Frieth, between Marlow and Henley-on-Thames, about 35 miles from central London. The race features winding woodland paths and country roads, offering stunning views throughout the course...

Southend Pier Marathon is a full marathon held on the sea along Southend Pier in Southend-on-Sea, England. The race takes place on the world’s longest pleasure pier, which stretches about 1.34 miles. Organised by Sussex Trail Events, the event is open to runners aged 18 and over and is limited to 10..

Titsey Trail 10k is a single-lap, off-road 10-kilometre race through the Oxted Woodlands, Limpsfield Common and the High Chart area of Surrey and Kent. The largely forest-trail course uses tracks, footpaths and bridleways, with a brief 200m stretch along a country lane; it starts flat, climbs modera..

The Ridgeway Run is a challenging 15-kilometre (9.3 miles) trail race organized by Tring Running Club, featuring scenic routes mainly on footpaths and bridleways with stunning views of the Chilterns. The course starts near Tring, ascends through the Ashridge Estate past the Bridgewater Monument, fol..

Aliens V's Trail Runners Daylight Trail is a trail running event held near Rendlesham Forest, a popular area known for its natural beauty and UFO lore. Scheduled for October 12, 2025, the event offers both a full marathon and a half marathon, with routes that are 95% off-road across diverse terrain...

Buckingham 10k is a charity running event in Buckingham Town Centre. The 10km multi-terrain route, organized by Run for the Sky, starts in the town centre and winds through Stowe Avenue, Stowe National Trust Gardens and farmland, offering a small-town atmosphere that blends urban and countryside sce..

South Downs Way Ultra Run is a 30-mile trail event in West Sussex, starting and finishing on Harting Down. The route highlights the best of the South Downs Way, including Beacon Hill, Cocking Down and Kingley Vale, with sections through ancient woodland and nature reserves as it reaches toward the s..

The Gatliff Marathon is a challenge walk, jog or run offering 25km or 50km distances through the Kent, Surrey and Sussex countryside, mostly on footpaths and tracks. Each year features a different route; entrants receive a route description and GPX file in advance. Organised by COPSE Club (Croydon),..

Centurion Autumn 100 is a 100-mile continuous trail race based in Goring-on-Thames and Streatley. The course forms a cross from four 25-mile out-and-back spurs along the Thames Path and Ridgeway, converging at Goring. Legs run Thames Path to Little Wittenham, Ridgeway to Swyncombe Farm, Ridgeway to..

The High Lodge Half Marathon – Autumn is a scenic 13.1-mile trail race held in Thetford Forest, Brandon, UK. The circular course features a mix of hard-packed sand, grassy footpaths, and forest trails, offering a multi-terrain challenge suitable for both road runners and trail enthusiasts. Participa..

Bedgebury Forest Half Marathon & 10K, organized by Nice Work Race Management, takes place at Bedgebury National Pinetum & Forest in Kent. The course offers traffic-free woodland trails through a pine canopy for two distances: half marathon and 10K. Described as challenging and scenic, the route weav..

The Viper 5 mile trail run (Autumn edition) is a 5-mile loop around the Ingatestone countryside, run on public rights of way. Hosted by Multisport-Management at The Viper in Mill Green, Ingatestone, the autumn edition uses the same route as the spring event but in the dark. It is a small-capacity, s..

Running Tribe Races in Buckinghamshire, England, offers endurance events at two venues: Courses 1–3 at Chalfont Park Sports Club in Chalfont St Peter and Courses 4–6 at Chalfont St Peter Community Centre. Runners can choose, on the day, from 7k, 10k, 14k, Half Marathon, Full Marathon, or a 30- or 40..

The Epping Forest Wildwood Trail Series offers a scenic half marathon and 10K trail run set in the heart of Epping Forest near London. Scheduled for October 25, 2025, the event showcases the vibrant autumn colors and ancient woodland. Runners navigate a varied course featuring well-maintained paths,..

The Beachy Head Marathon is one of the UK's largest off-road marathons, held in the scenic South Downs National Park near Eastbourne. Formerly known as the Seven Sisters Marathon, it offers a challenging and picturesque route starting and finishing at Eastbourne Seafront along the South Downs Way. T..

Thames Trail Ultra is a 47-mile point-to-point ultramarathon along England’s longest river, from Hawkwell House Hotel in Iffley to the YMCA Y Centre in Henley-on-Thames. The route follows the Thames Path and Ridgeway National Trails, offering a mix of cross-country trails, riverside paths, and a sma..

Blackwater Marathon 2025, the 25th edition, is staged from Drapers Farm Sports Club in Heybridge, Essex. This circular event on the north side of the River Blackwater estuary uses cross‑country footpaths and sections of seawall. Choices are 26.5 miles or 18 miles, with age restrictions: 26.5 miles f..