Trail Running calendar near Grafham Water 2025-2026

Take in sweeping views from Watership Down on scenic trails with marathon, half and 10K options. Enjoy chip timing, a finisher medal, goody bag and a keepsake beer glass while supporting Hampshire and Isle of Wight Air Ambulance.

Tackle scenic but hilly forest trails at the Wendover Woods Half Marathon and 10k on 14 June 2026, with a friendly junior run and on the day entries if available. Spectators can enjoy a cafe, forest walks and family activities.

Run through Hertfordshire countryside from 3 Brewers Brewery with 10 km and 5 km options over mostly off road trails, woodland and farm tracks. Finish with a medal, chip timing, a pint and live jazz for a festive post race vibe.

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..

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..

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..

Beyond London on 20 June 2026 offers scenic trail runs through parks, woodlands and canal paths, finishing in Richmond. Choose 55 km from Woolwich or 25 km from Upper Norwood, with signed routes, GPX files, aid stations and a finisher medal..

Push your limits at Solstice at the Lakes, a timed trail at Leybourne Lakes Country Park with 6 hour, 12 hour and 24 hour solo and team options. Run as many laps as you can on a flat 2.5 km loop with live timing and a lively race village.

Run a scenic point to point trail through Buckinghamshire, Bedfordshire and Northamptonshire with a 50 mile ultra or a marathon, both finishing at Marlow Park, Grafham Water. Waymarked routes, aid stations and medals for all finishers.

Take on the Dunstable Downs Half Marathon, a scenic 21.2 km trail with steep climbs and panoramic countryside views. Limited to 300 runners, this rugged UTMB World Series qualifier promises a memorable off road challenge.

Run Sandringham on 21 June 2026 and enjoy scenic 5K and 10K routes through the royal estate, blending trails and quiet roads. Expect chip timing, a bespoke medal, finish goodies and marshals for a polished race day.

The Summer Solstice Challenge - Colchester will take place in Colchester on Sunday 21 June 2026.

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

Run the Martian Race at Horsell Common on 21 June 2026 and follow routes through the sandpits immortalised in H.G. Wells The War of the Worlds. Volunteer organised and charity focused, with distances for all ages.

Tackle a full marathon over three days at the Colworth Marathon Challenge on the scenic Colworth Estate. Choose one, two or all three races and enjoy free camping, family entertainment and children's races for a festival feel.

Take on farm trail laps at Hyde Hall Farm with distances from 5k to ultra, including a Heavy Half option. On site parking and a bespoke finisher medal make for a friendly, flexible event.

Enjoy scenic trail running around Carsington Water with undulating routes for a 10K or half marathon, both fully marked and chip timed. Finish with a bespoke medal, free photos and post race goodies in a lovely lakeside setting.

Enjoy scenic Thames Valley trails at Marlow Rugby Club with 5K, 10K and Half Marathon options on well marked off road courses. Chip timing, free race photos and a themed finisher medal make this a fun, sustainable event for all abilities.

Take on multi lap 5K loops at the Snickerthon in scenic Chasewater Country Park with distances from 5K to full marathon. Enjoy a relatively flat course, finisher medal and maybe a Snickers plus refreshment stops.

Choose from 10K, half marathon, marathon or 50 km on scenic, well marked trails through Salcey Forest. A friendly community day with generous time limits, forest underfoot and a medal plus drink for every finisher.