Trail Running calendar near Harwell 2025-2026

The Fox is a scenic trail run in the Surrey countryside on Saturday 23 May 2026, offering 20K, 41K and 62K races for all abilities. All races finish at Burys Field, Godalming, with marked courses and stocked aid stations.

Take on the Grand Union Canal Race, a nonstop 145 mile ultra from Birmingham to Little Venice along scenic towpaths. Limited to 100 starters with a 45 hour limit, it welcomes supported and unsupported runners for a true canal challenge.

Farmmageddon is an endurance weekend at Hyde Hall Farm offering looped trail racing on a scenic 5.3 km course. Choose from timed challenges up to a 100 mile two day event with buckle and medal rewards for finishers.

Join a scenic 26.2 mile marathon in Richmond Park over three laps of the Tamsin Trail and park perimeter. A 3 mile kids challenge follows, with on course drink stations and medical support for a safe, memorable morning.

Take on the Ridgeway Challenge, an 86 mile point to point trail race along Britain’s ancient Ridgeway from Ivinghoe Beacon to Avebury. Tackle the full route in 28 hours for a true long distance test across rolling chalk downland and prehist..

The Three Castles 50km Ultra Marathon is a scenic race held in Kent, England, starting in Rochester and finishing at Tonbridge athletics track. The flat course follows the River Medway, passing three medieval castles, charming villages, and..

Beat the Sunset 50km in Maidenhead is a single lap, mostly off road Thames Path and Jubilee River course that offers a flat, scenic 50 km challenge as the sun sets. Enjoy on course feed stations, chip timing and live tracking for a memorabl..

The Circuit du Sore Legs is an annual running event held at Wodson Park Sports and Leisure Centre in Ware, Hertfordshire. Now in its sixth year, it offers a unique challenge of completing various distances on a 400-meter athletics track, in..

Run the scenic Southampton Common, winding through woodland, ponds and parkland with half marathon, 10K, 5K and junior races. Enjoy marshalled routes, a lively event village with food and partner stalls and optional event T shirt.

Join the Griffin Challenge at Braybrooke Taproom on 3 June 2026, a six hour looped event on the Griffin Trail where runners, walkers and hikers do as many laps as they like. Celebrate after with coffee, pastries and a cold beer.

Join a guided trail half marathon through the scenic Surrey Hills, starting and finishing in Guildford with climbs past St Martha's Hill and stretches of the North Downs Way. Run as a friendly group not a race, led by an experienced ultra r..

Event overview The event takes place on Friday, 05 June 2026 as a 7 hour timed challenge. Participants may run any distance they choose within the time limit. The minimum distance to be an official finisher is 3 km. The normal lap length is..

BigSea Trails (WATER) is a trail running event held on the Isle of Purbeck, Dorset, starting and finishing on the sandy Knoll Beach at Studland. Part of the Classic Element Trail Series, this race celebrates the element of water with routes..

Run through two lit railway tunnels beneath Bath on routes from short fun runs to ultra distances. Starts and finishes at family friendly Brickfields Park and each entry supports Sustrans, making it a memorable community day out.

Join Chase The Sun at Clapham Common on 10 June 2026 for a friendly 5K or 10K on a flat park circuit that passes the bandstand. Enjoy a themed medal, free photos and post race treats in a fun community atmosphere.

Run the scenic Cotswold Way from a Cirencester basecamp on 13 and 14 June 2026, choosing a full 100 km loop or shorter trail distances to suit every level. Expect rest stops, GPS tracking, medical and massage teams, plus camping and caterin..

Run the South Downs Way 50 km on 13 June 2026, a scenic chalk ridge ultra with about 4,000 ft of climb across mostly trail. Four aid stations, a 9 hour cut off and a memorable finish at Queen Elizabeth Country Park await.

Take on the iconic South Downs Way 100, a 100 mile non stop trail race across chalk ridges from Winchester to Eastbourne on 13 June 2026. Expect rolling views, tough climbs and a 30 hour cutoff for seasoned ultrarunners.

Run through rivers, bluebell woodlands and fields at the Nene Valley Trail Run on 13 June 2026 in Fotheringhay. Choose 10 or 20 mile routes, camp onsite and help support Kings Cliffe Active with every entry.

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.