Trail Running Calendar South East (England) 2025-2026

Race to the Stones is the UK's largest ultramarathon, held along the ancient Ridgeway trail from Lewknor to the 5,000-year-old Avebury Standing Stones, a UNESCO World Heritage site. The event offers a challenging 100km course with 1,340m of elevation, which can be completed non-stop or over two days..

The North Downs 50 Ultra Challenge is a supported endurance event set in Surrey, UK, offering a 50 km looped route through the scenic North Downs and Surrey Hills. Participants can walk, jog, or run, with options for 25 km and 10 km distances, starting and finishing at Guildford. The event features..

The Thackray Williams Sevenoaks 7 is a celebrated running event taking place in Knole Park, Kent, marking its 30th edition in 2025. This challenging 7-mile race features scenic trails with hills and twists, appealing to both competitive runners and casual participants. Additionally, a 3.5km chip-tim..

The Surrey Hills 10km is a guided trail run set in the picturesque Surrey Hills Area of Natural Beauty, starting near Guildford at St Martha's Hill. The 10km route features a scenic climb to the hilltop church with panoramic views, followed by a run to Newlands Corner overlooking Surrey’s rolling hi..

The Humanity Direct Chiltern Challenge is a one-day ultra running event set in the scenic Chiltern Hills, offering distances of 10 km, 25 km, and 50 km. Participants can walk, jog, or run through well-marked routes that showcase the area's natural beauty, with checkpoints providing water and food. T..

The Maverick X Series Chilterns 2025 is a trail running event held at the historic Stonor Park estate near Henley-on-Thames, Oxfordshire. Set within the Chilterns Area of Outstanding Natural Beauty, the race offers four challenging routes ranging from 12 km to an ultra 52 km, featuring significant e..

The Hughenden Valley Half Marathon is a scenic trail running event held around the National Trust's Hughenden Manor and its surrounding woodlands in the Hughenden Valley. Covering 21.1 km with over 450 meters of elevation, the course features hilly terrain with woodland and rural trails, offering a..

The Pewsey Vale Ultra is an exciting new running event featuring a challenging 125km loop through the picturesque Wiltshire countryside, following the Pewsey Vale Circular walk route. Participants will experience a total ascent of 1902m, with the course well-marked and supported by checkpoints every..

The Hughenden Valley 10K is a popular trail running event organized by Runaway Racing, set around the scenic Hughenden Manor estate near High Wycombe. Scheduled for July 19, 2025, the race features a challenging 10-kilometer course through woodland and rural trails, with significant elevation change..

Bright Skies - Surrey Hills is an exciting daytime trail running event featuring a half marathon, 10-mile, and 10K races, along with 1K and 2K kids' races for ages 3-12. Set in the picturesque Surrey Hills, the course offers a scenic and challenging route through the Denbies Wine Estate. This event,..

The Surrey Slog, also known as the Holmbury Hill Challenge, is a challenging trail half marathon set in the picturesque Surrey Hills. Scheduled for July 20, 2025, the event features a hilly, multi-loop cross-country course primarily on tracks around Holmbury Hill. Participants can choose between a f..

The Ashdown Forest 10 & 5 Mile Series is an eco-friendly trail running event held at Pippingford Park Manor in East Sussex. This two-race series offers 10-mile and 5-mile distances across undulating, multi-terrain forest trails featuring picturesque scenery. Designed to provide a guilt-free, sustain..

The Valley Park Tour of the Woods is a unique 10 km trail race set in the picturesque woodlands of Chandler's Ford, Hampshire. This event, organized by Chandler's Ford Swifts Running Club, features a mixed terrain course divided into five stages, allowing participants to rest between segments withou..

BigHeat Trails (FIRE) is the third event in the Classic Element Trail Series, celebrating the element of Fire. This trail running event features two challenging single-lap courses through the scenic landscapes of Thursley and Hankley Commons, with options for a 16-mile run or a marathon distance. Pa..

The Maverick X Series East Sussex 2025 is a trail running event held at Stanmer Park near Brighton, East Sussex. It offers five routes ranging from a 6 km sprint to a challenging 50 km ultra, all featuring hilly, hard-packed trails suitable for all levels. The course includes scenic sections of the..

The White Horse Gallop is a circular half marathon trail running event that begins and ends on the Ridgeway, showcasing the scenic beauty of National Trust sites, including Ashdown House and the historic White Horse Hill. The course features an "undulating" route, providing a challenging yet enjoyab..

The Wendover Woods 10K is a trail running event held at Wendover Woods in Buckinghamshire. It features a challenging 10-kilometer course with approximately 250 meters of elevation, set entirely on scenic woodland trails with no road crossings. The race offers a lively atmosphere, fully marked and ma..

Sussex Loops is a challenging walking and running event held at Forest Row Village Hall in East Sussex. Participants can choose from four distances: 12, 18, 25, or 31 miles, with up to 3,250 feet of ascent, to be completed within 11 hours. The course consists of three loops exploring the scenic Ashd..

The Harting Multi-Terrain '10' is a challenging 10-mile race held at the War Memorial Sports Ground in South Harting, West Sussex, within the scenic South Downs National Park. Organized by Liss Runners volunteers, the event features a tough course over private lanes, gravel tracks, bridleways, and f..

The Guided 10K Pub Run will take place in New Alresford on Sunday 3 August 2025. You can run 10 kilometers.