Trail Running calendar near Henley-on-Thames 2025-2026

YHA 14 mile trail run The event is scheduled for 14 June 2026 and covers 14 miles on trail. The race holds TRA permit 7715. The course begins with a climb and includes sections that can be slippery, with muddy puddles and chalk descents. Co..

Wendover Woods Half Marathon & 10k, staged in Wendover Woods, Upper Icknield Way, Aston Clinton, Buckinghamshire, offers trail runners a forest challenge. The course comprises a hilly 10k multi-lap route through Wendover Wood forest, with H..

The Phoenix Denbies Marathon & Half Marathon, held at Denbies Wine Estate in Dorking, Surrey, offers a unique off-road trail running experience on a flat-ish 1-mile loop with slight inclines. Scheduled for June 2026, the event features flex..

Beyond London offers two routes: a 55km Ultra and a 25km Trail. The event starts in Woolwich for the ultra and Upper Norwood for the shorter race, finishing in Richmond upon Thames. The route follows the Capital Ring inner circle, exposing..

The Centaur 100 Mile Ultra, hosted by Phoenix Running, is a unique 100-mile trail running event held at Denbies Wine Estate in Dorking, Surrey. Designed for both seasoned ultra runners and first-timers, the race features a flat-ish, single..

Three Shires Way Ultra & Marathon The event takes place on Saturday, 20 June 2026 and features two point-to-point races along the Three Shires Way through Buckinghamshire, Bedfordshire and Northamptonshire. Distances: 50 Mile Ultra Mar..

Event overview P24 - The Longest Attended Day is scheduled for Saturday 20 June 2026 at Denbies Wine Estate in Dorking, Surrey (RH5 6AA). The format requires participants to run 1 mile at the same time each hour, repeated 24 times across 24..

Race to the King is Threshold Trail Series’ king-sized ultramarathon along the South Downs Way and Monarch’s Way. On 20 June 2026 at West Dean Gardens, runners can choose from four distances: Monarch’s Loop 30km, Coastal 50km, Castle 50km,..

Solstice at the Lakes is a timed trail running event held at Leybourne Lakes Country Park in Kent, featuring 6-hour, 12-hour, and 24-hour race options. Participants can compete solo or in teams (pairs or up to four runners) on a flat, fast,..

Dunstable Downs Half Marathon on 21 June 2026 is a scenic 21.2 km trail with 450 m of climbing across National Trust downs, offering big views and tough terrain. Limited to 300 runners, it features marked trails, an aid station and a post r..

Event overview The Martian Race is scheduled for 21 June 2026 at Horsell Common, Woking, Surrey. The event is organised entirely by volunteers and proceeds are distributed to local charities selected by the Woking Lions. The 2025 event rais..

The Midsummer Munro will take place in Walton on the Hill on Sunday 21 June 2026. You can run 13 miles.

Colworth Marathon Challenge The Colworth Marathon Challenge is a three-day running event held on the Colworth Estate in North Bedfordshire, UK. The event comprises three separate races that together total the marathon distance of 26.2 miles..

Join the Summer Run the Seasons at Cowdray Estate on 26 June 2026 for scenic 5km, 10km and dog friendly canicross routes past the polo lawns, ruins and the South Downs. Celebrate at the finish with an interlocking medal, free photos and a B..

The Cock-a-doodle Dawdle, organized by Zigzag Running, is a trail running event held at the scenic Hyde Hall Farm in Buntingford, Hertfordshire. Now in its third year, the race offers multiple distance options including 5k, 10k, 15k, Half M..

TrailFest - Salcey Forest TrailFest - Salcey Forest is a multi-distance trail running event held on Sunday, June 28, 2026 at Salcey Forest, NN7 2HX near Northampton. The event offers the following distances: 10K Half marathon Marathon 50 k..

Event details The RunThrough Marlow Trail Run is scheduled for Sunday 28 June 2026. The event base is Marlow Rugby Union Football Club, Riverwoods Drive, Marlow SL7 1QU. Group bookings for six places are listed at £150. Half Marathon - £32..

Event overview This is a guided trail run in the Devil's Punchbowl, Hindhead, Surrey. The route is 10km and is run as a group; it is explicitly not a race. The listed cost is £16 per person. Parking is available at the meeting car park. Par..

Event overview The Full Essex Way Ultra is an 82-mile ultra-marathon along the full Essex Way trail. The route starts at Epping tube station and finishes at the high lighthouse in the port of Harwich. The event is scheduled for 3-4 July 202..

Event overview The SATURN Midweek Chasing Numbers event takes place on Friday, 3 July 2026 at Wraysbury Skiff & Punting Club, Egham (TW20 0AE). It is a 7 hour Time Challenge with flexible start times available throughout the day. The ev..