Trail Running calendar near Harwell 2025-2026

Stonehenge Stomp, organized by the City of Salisbury Athletics & Running Club, is a non-competitive walking event held near Stonehenge in Wiltshire. The 36th edition is scheduled for Sunday 25 January 2026. Participants can tackle 10, 20, 30 or 40 km on fully marked trails (all routes offer Stonehen..

Set in Moors Valley Country Park & Forest near Ringwood, Dorset, the Moors Valley Wildwood Trail Series Half Marathon & 10K offers two woodland trail routes. Participants can choose the Half Marathon (two laps) or the 10K (one lap) across forest gravel paths. The event is fully marked with aid stati..

Organized by RunThrough UK, Windsor Trail Run takes place at Alexandra Gardens, Windsor, with a backdrop of Windsor Castle. Held on Sunday 25 January 2026, the event offers a flat, scenic trail course suitable for both 10K and Half Marathon distances. Runners enjoy well-marked trails, steady elevati..

Ashdown Forest 10 & 5 Mile Series: Race Two is the second in Nice Work's eco-friendly two-race series held at Pippingford Park Manor, Nutley, East Sussex. The event offers 10-mile and 5-mile trail races on hard-packed paths and forest trails through Ashdown Forest, featuring hilly sections and pictu..

The Fitstuff G3 Series No.2 is a running event held at Hound House Road, Surrey GU5 9JG. Participants can choose between 10km and 15km race distances. The start line and parking are conveniently located in a field off Hound House Road, marked with flags and signs for easy navigation.The event offers..

Devil's Punchbowl 10km is a guided trail run around the Punchbowl in Hindhead, Surrey. The 10km route follows scenic trails with several hills, run at a group pace rather than a race. It suits those new to trail running or who prefer running with others, especially at dusk or night.Top views are pau..

Location: Daventry Country Park, NN11 2JB, United Kingdom. Squirrel Challenge is a 6-hour trail event for runners, walkers, and canicrossers on a 3.3-mile loop. You choose how far to go, completing as many laps as you wish within six hours (roughly 5k to 80k+).The route is mostly crushed-stone paths..

The Westonbirt Arboretum Winter Night Race is an exciting running event set in the stunning National Arboretum, featuring over 2,500 tree species. Participants can choose between 5km and 10km routes, which showcase the arboretum's diverse landscapes and solid terrain, providing a unique blend of tra..

UK Ultra's Hibernal Hills 50 Mile is the season opener held at Queen Elizabeth Country Park, Hampshire. This ultramarathon covers about 50 miles on 99% trail, 1% road, with 6,400 feet of ascent and descent and undulating hills throughout. The route starts via the Staunton and Monarchs Ways, then cli..

Pilgrim Challenge is a two-day 66-mile or one-day 33-mile ultramarathon along the North Downs Way in Surrey. The start is at Sandy Farm Business Park in Farnham, and the route winds through countryside, villages and rolling downs with about 2,374 meters of ascent. The course is fully marked with sig..

The Westonbirt Arboretum Winter Day Race is a scenic running event set in the stunning National Arboretum, featuring over 2,500 tree species. Participants can choose between a 5km or 10km race, with routes that showcase the beauty and diversity of the arboretum's landscape. The event is designed to..

The Cold Norton Charity Winter 10K & Half Marathon Trail Event is a winter charity trail run in Essex, raising funds for Farleigh Hospice. Held at Charity Farm, Crows Lane, Woodham Ferrers, it offers 10K and 13.1-mile routes run mainly on grass, tracks and rural paths around Woodham Ferrers. The cou..

XTERRA Matterley is an off-road sporting event held at the scenic Matterley Basin in Hampshire, United Kingdom. Scheduled for February 14-15, 2026, it offers a variety of race formats including duathlons and trail runs suitable for athletes of all levels. The duathlon races feature distances such as..

The 'Rayne'ing Medals Anniversary Challenge is a running event celebrating six years of Hare & Tortoise Running, taking place on The Flitch Way in Rayne. Participants can choose from five entry options, including a marathon, 6-hour timed event, 5km, 10km, and half marathon. The course features 5km l..

Winter Trail Run is the fourth edition of the Trail Run at Gatton Park, near Redhill/Reigate, RH2 0TW. The event offers a 5K multi-terrain loop around the scenic Gatton Park and you can choose to run one or two loops for 5K or 10K. The atmosphere is friendly and social, with a dedicated Canicross ev..

Two Tunnels Races in Bath, UK, organized by Relish The Great Outdoors, offer a unique underground running experience alongside city scenery. The courses pass through the Devonshire Tunnel (408m) and the longer Combe Down Tunnel (1672m), both well-lit and surfaced as a shared-use path—the longest und..

BigMud Trails (EARTH) is the first event in the Classic Element Trail Series, celebrating the element of Earth. Set in the scenic Meon Valley at Queen Elizabeth Country Park, participants can choose between a 16-mile or marathon distance, both featuring challenging single-lap courses with significan..

Hadleigh Legacy 10k is an award-winning, sell-out trail running event at Hadleigh Country Park in Essex. The 10-kilometre single-loop course blends footpaths, fields and off-road trails with an undulating, hilly profile and plenty of mud, set against views of Hadleigh Castle. The GPS-marked, multi-t..

The St Peters Way Ultra is a challenging 42-mile trail ultra marathon held in Essex, England, following an ancient pilgrimage route from Chipping Ongar to the historic St Peter-on-the-Wall chapel at Bradwell on Sea. The course traverses scenic countryside, historic churches, and varied terrain inclu..

North Downs Ridge 50k Ultra, organized by Freedom Racing, runs along the North Downs Way from Denbies Wine Estate near Dorking to Guildford and back, incorporating a Surrey Wildlife Trust reserve at Norbury Park. The 50-kilometer trail ultramarathon features about 2,986 feet of ascent, fully signed..