Trail Running calendar near Harwell 2025-2026

Run a flat, traffic free 10k on the National Cycle Network from Calne to Stanley near Chippenham, chip timed and well marshalled on an out and back multi terrain course. A 1 mile fun run for under 17s and limited entries make this a friendl..

Run Brimscombe's canal towpath at the Back to the 80s timed event, choosing any mix of 2.62 mile laps to make 5k to ultra distances. Enjoy a relaxed one hour start window, seven hour limit and a bespoke finisher medal to mark your effort.

Enjoy a flat, scenic riverside run along the Thames at Magna Carta Winter in Runnymede, with 10k, half and full marathon options on out and back laps. Chip timing, marshals and a bespoke finisher medal make this a rewarding winter race.

Choose your distance on the day and tackle scenic looped courses through woods and trails around Chalfont St Peter, with pacers welcome and a trained medic on standby. Distances from 7k to ultra are offered and top three finishers earn meda..

Join Any Kind of Weather Runner at Northampton Active on 21 February 2026 for a six hour challenge where you can tackle distances from 5k up to ultra. Finishers receive a medal and goody bag and aid stations on each lap will keep you fueled..

Take on the scenic 42 mile St Peters Way Ultra from Chipping Ongar to the St Peter on the Wall chapel at Bradwell on Sea, finishing along a raised sea wall. Expect muddy, changeable terrain with checkpoint support and live tracking.

Explore Bath's lit Two Tunnels on a unique shared use course, with distances from 500 m fun runs to half marathon routes on tarmac and trail. Wave starts, on course support and a charity donation make this a feel good racing day.

BigMud Trails EARTH kicks off the Classic Element Trail Series at Queen Elizabeth Country Park, guiding runners through the Meon Valley and South Downs with two ascents of Butser Hill. Options: 16 miles, marathon or 50 km on muddy trails.

Head to Hadleigh Country Park for the Hadleigh Legacy 10k, a scenic but testing off road route around Hadleigh Castle with muddy trails and steep climbs to test your legs. Wave starts, clear waymarking and helpful marshals keep the event fl..

Join the Winter Trail Run at Gatton Park on 22 February 2026 for scenic multi terrain 5K and 10K loops, plus a Canicross category. Expect a finisher medal, bag drop and refreshments, with prebooked parking helping to support Gatton Trust.

North Downs Ridge 50k on 22 February 2026 starts and finishes at Denbies Wine Estate, following the North Downs Way with a scenic loop through Norbury Park. Expect rolling ridgelines, staffed aid stations and a wooden finisher medal.

Enjoy a scenic off road 9.5 km trail around Kinver Edge and the Rock Houses, run as two laps over tracks and trails. Limited to 100 runners, the event includes medals, finish goodies and prizes for the top three in each category.

Join the Dirt Run, a two round multi terrain series in Northamptonshire at Irchester on 25 January and Brigstock on 22 February. Choose 5 km to 15 km on mixed trails, paths and roads with a muddy hill to test you and a custom medal for fini..

Take on the Sorbrook Slog on 22 February 2026, a lively 7 mile multi terrain race through footpaths, fields and gullies around Sorbrook and Sluvad in Cwmbran. Enjoy marshals on course, post race tea and cake and a finishers goodie bag.

The Terminator 2026 is a tough but rewarding 12 mile trail race around Pewsey, Wiltshire, mostly off road with muddy climbs and high point views. All finishers receive a unique T shirt and race village treats await.

Run Reigate Canicross & Trail at Gatton Park on 22 Feb 2026 offers scenic multi terrain 5K and 10K trail races plus a dedicated canicross. Chip timing, medals for humans and dogs and tasty treats for pups make it a fun day out.

Join a guided 10 km trail run through Thursley National Nature Reserve, an easy, mostly flat route ideal for first time trail runners at about 10 min per mile. Enjoy heathland scenery and Britain’s Favourite Path boardwalk.

Join G3 no.3 at Newlands Corner, Guildford for a choice of 10 km or 15 km routes across Surrey countryside on Saturday 28 February 2026. Friendly, well marked courses with series entry options make this a perfect early season challenge.

Run a guided 30 mile trail across the South Downs Way and nearby hills, from Harting Down through ancient woodland and nature reserves. Ideal for first time ultra runners, it's led by an experienced mountain leader and coach.

Experience coastal trails and stunning views of Durdle Door at Lulworth Cove Trails in West Lulworth on 28 February 2026, with 10K, 27K and 50K options over rugged climbs, descents and stiles. Aid stations, parking and route maps are provid..