Trail Running calendar near Guildford 2026-2027

ATW Grafham 5K and 10K take place at Grafham Water Visitors Centre on 25 October 2026. Entry fees range from £24 to £33, the races run alongside the ATW Grafham Duathlon, and camping is available the night before.

An off-road event south of Canterbury offering marathon and half marathon routes across scenic trails and country lanes. Checkpoints, mandatory kit requirements, OpenTracking and Event HQ facilities are provided.

Looped races at Chalfont Park and Chalfont St Peter let runners choose distances from a 7K loop to multi lap ultras. Aid station, clear course marking, crew support and medical cover are provided.

Essex Walker offers a 26 miles figure of 8 route and an 18 miles variant on footpaths and bridleways around Blackmore. It is part of the Essex and Herts Triple Challenge and includes checkpoints, refreshments, and a finishers certificate.

A Halloween themed night time run at Irchester Country Park on 30 October 2026 offering 5k and 2k family runs, finishers medals, Halloween treats, free event photos and prizes for top 3 men and women in the 5k.

A 5 mile self navigated night trail run from The Plough and Harrow in Litlington with Halloween fancy dress, GPX navigation, trophies for best dressed and a timed but social atmosphere.

A single-loop **50K** trail race from Berkhamsted through Ashridge and along The Ridgeway, featuring 800 m of ascent, fully marked navigation, three full aid stations and a 9-hour cutoff.

A Halloween themed *6.66 km* trail run in Chelmsford on 31 October 2026 with GPX/Strava route support, fancy dress prizes and a brewery finish offering a medal, drink and crisps.

A night gravel trail run in Alice Holt Forest with 5 km laps and three distance options, head torch navigation, on-course outposts and on-site parking and facilities.

An evening Halloween run at Hogmoor with kids and adult loop options, varied sandy and muddy terrain, fancy dress encouraged, free parking and medals for finishers.

A timed, lap-based run along the Itchen Way in Winchester with 2.62 mile loops, a seven hour limit, flexible start times, an aid station with vegan options, and a bespoke finisher's medal.

Coastal trail runs on West Wittering Beach with three distances on sandy flats at low tide, chip timing, on-course water stations and a finisher medal. One dog per runner is permitted and spectators are welcome.

Forest trail races at Wendover Woods on 1 November 2026 include marathon, half marathon, 10k and a junior run over a multi-lap 10 km course with varied, hilly terrain and on-site facilities for spectators.

Two days of marathon and half marathon races around Caldecotte Lake in Milton Keynes on 6 and 7 November 2026, with multi-lap clockwise courses, on-course water and toilets, enforced time limits, and bespoke finisher medals.

A sold out trail run from Goodwood Racecourse into the South Downs National Park, with 21.3k, 16.5k and 12k routes through forest tracks, bridleways and the South Downs Way. Entries include chip timing, a medal and on-course refreshments.

Night trail running at Stonor Park in the Chiltern Hills on 7 November 2026 with three waymarked routes of 17 km, 13 km and 7 km. Outposts, parking, timed results and finish facilities are provided; dogs are not permitted.

A winter obstacle race in Brentwood, Essex featuring muddy courses across farmland, woodland and lakes. Distances range from about 6 km to 24 km with dozens to hundreds of natural and man made obstacles and chip timing for participants.

Take on flat, scenic laps along the Thames towpath in Walton on Thames with flexible starts and distances from 5 km to ultra. Limited places, aid stations, digital results and medals make this a friendly, festival style challenge.

Experience a scenic trail run through the Bedfordshire countryside starting from Leighton Buzzard. Choose between a classic half marathon or a metric distance featuring canal towpaths, woods, and rolling hills.

A twilight off road 10k around Eastbury Park and Chettle with wooded sections and historic landmarks. Medals, trophies and refreshments included and entries are limited to 200.