Trail Running calendar near Chalfont Saint Peter 2026-2027

A military style obstacle mud run at Hever Castle on 10 and 11 October 2026 offering 3K, 6K and 12K routes with replica Commando obstacles, an event village and a 2-hour survival experience.

Choose a scenic 10k or shorter 5k through the Chiltern Hills around Frieth, combining woodland paths and country roads. Expect rolling climbs and panoramic views for a rewarding, hilly challenge for road and trail runners.

The Titsey Trail 10k is a community running event held on Sunday, 11th October 2026. Organized by runners for runners, it raises funds for a variety of local charities.

Trail races at Grafham Water from Marlow Park with fully marked 10k and half marathon routes, water stations and on-course first aid. Entries priced at £25 and £30, minimum ages apply, and all finishers receive a medal.

A community-run event in Old Basing with chip-timed 10K and 6K trail races plus a 2K family fun run, raising funds for Friends of Old Basing Schools.

A single-lap 10K on 11 October 2026 around Burnham on Crouch, featuring sea wall coastal paths and countryside trails. The event is based at Dengie Hundred Sports Centre with free parking, facilities and post-run food and drink.

MacTuffX Swindon at the County Ground on 11 October 2026 pairs ten Xercises with running across solo, doubles and relay formats, with an 18 plus age requirement and a LITE weight division available.

A circular half marathon through Thetford Forest with mixed hard-packed and forest trails, cupless water refills, eco-friendly finisher medals and podium trophies. Minimum age 17 and a 3.5 hour cut-off.

A community off road running event in Marshfield on Sunday 11 October 2026 with children's and adult distances. Entries support Marshfield Primary School and the routes use temporary access across private land.

A nighttime backyard ultra from Vigo Rugby Club that sends runners repeatedly on a 4.167 mile loop, starting each hour. Options include an open-ended Backyard Ultra or a 7 hour Challenge, with buckle and medal awards plus a team prize.

A 100 mile trail race from Goring & Streatley using Thames Path and Ridgeway routes in four 25 mile out and back spurs. The event has 16 aid stations, full medical support, a 28 hour cut off and mandatory kit and qualifier requirements.

An annual 25 km and 50 km challenge walk, jog or run through footpaths and tracks in Kent, Surrey and Sussex on 17 October 2026. Entrants receive route files and have checkpoints, food and first aid included.

A guided 10 miles trail run around the Chilterns, following canals and reservoirs and passing Britain’s oldest post windmill. The event includes a run leader, trail technique instruction and a finisher’s medal.

Roughly 12K trail run on bridle paths and the Imber Range near the Westbury White Horse on 18 October 2026. Limited to 200 places so book early for a bespoke finisher medal and category prizes.

Trail races at Bedgebury National Pinetum & Forest on 18 October 2026, offering a half marathon, 10k and junior race on traffic-free woodland trails. Route maps with GPX files are available; entries include a medal, photos and limited free..

An off‑road cross‑country race in Hardwick, Buckinghamshire, covering about 6 miles across varied terrain and water crossings. Entry is limited to 300 runners, with medals and category prizes including team awards.

A 10K trail run through the private grounds of Hole Park in Cranbrook, Kent on 18 October 2026, featuring parkland and woodland sections, timed results, official photography and bespoke finisher medals.

A multi-distance running festival in Palace Green, Ely offering way-marked out-and-back courses from 10k to an ultra with aid stations, timed results and a custom event medal. The ultra includes checkpoints and on-course support.

The Blackdown Hill Challenge on 18 October 2026 is a trail running event from Fernhurst Recreation Ground to the Temple of the Winds, featuring a 866 ft climb and wide views. A shorter adult trail of about 4.5 km is also offered.

A 5k night trail at Dunkertons Park in Cheltenham where runners use head torches to light the course. Open to ages 16 and over, with prizes for top three men and women and on-site refreshments and safety rules.