Trail Running calendar near Harwell 2025-2026

The Bluebell Bash is a trail running event in Manswood, Wimborne, UK, organized by Tri-Counties Trail Running. It offers three distances—half marathon (13.1 miles), 10K, and 5K—with full accessibility for canicross. Runners traverse scenic bluebell forests with gentle hills and expansive views.The e..

BigWayRound - Winchester is an award-winning, Gold-rated trail running event held at Winchester Rugby Club. The event offers four distances: 14 miles, 19 miles, a marathon, and a 50K ultramarathon, catering to both new and experienced trail runners. The course features stunning views and traverses i..

The Harewood Forest Trail Race is staged in Harewood Forest in the heart of the Test Valley, near Andover, Hampshire. Runners can choose between 5k and 10k trail routes on undulating forest tracks, offering a challenging yet scenic course. Described as a spring race set in a beautiful woodland setti..

The Goring Gap Trails event, held in Mapledurham near Reading, offers a variety of running and walking challenges, including a 50-mile ultra, a 52K ultra, and a half marathon, alongside walking options of half marathon, full marathon, and a 6-mile walk featuring a river boat crossing. The event is l..

The Run Rabbit Trail Festival is a multi-distance trail running event held at the scenic Deene Park Estate near Corby. Scheduled for May 2026, it offers three main challenges: the Trail Mix Challenge (25k), featuring five different 5km loops run hourly over five hours; the Headlight Hop (10k), an ea..

The Collingbourne Races, held at Crawlboys Farm in Ludgershall, offer a scenic off-road running experience through the beautiful Collingbourne woods. Featuring a half marathon and a 10km race, the course includes bridle paths, woodland tracks, and single-track trails, making it suitable for runners..

Run to the Sea Brighton is a 50 km point-to-point ultramarathon from Christ's Hospital School in Horsham to Hove Lawns on the Brighton seafront. The multi-terrain course features trails, rolling downs and a coastal promenade, offering scenic views and a reputation for superb organisation and a frien..

The Chiltern Hills 100K is a 100-kilometer ultra marathon held in the Chiltern Hills, Buckinghamshire, UK. The race features an anticlockwise loop starting and finishing in Chesham, passing iconic landmarks such as Ashridge Estate, Coombe Hill, Whiteleaf Hill, Bledlow Ridge, and Great Hampden. With..

The Epona 100 is a challenging 100-mile ultramarathon held in Abergavenny, featuring a demanding 17,000 feet of elevation gain. The course offers a stunning mix of iconic trails, including Offa’s Dyke, Cambrian Way, and Beacons Way, providing runners with breathtaking mountain passes and diverse ter..

Shires and Spires Anti Clockwise Edition 2026 is a five-distance circular running event based at Naseby Village Hall in Northamptonshire. Runners can choose from 10K (road), Half Marathon (13.4 miles), Three-Quarter Marathon (19.1 miles), Marathon (26.6 miles), or Ultra Marathon (35 miles). The cour..

North Downs Way 50 is a 50-mile point-to-point ultramarathon hosted by Centurion Running, running along the North Downs Way National Trail from Farnham, Surrey to Knockholt Pound near Greater London. The route features about 5,600 feet (1,700 m) of ascent and reflects the first 50 miles of the NDW10..

Jurassic Coast Challenge is part of Ultra Challenge Series along Dorset’s World Heritage coastline. Distances: 100km, 75km, ~50km and ~25km, plus a Weymouth Marathon loop and Bridport 10K. The course runs from Corfe Castle via Swanage, Lulworth Cove and Durdle Door, with Weymouth at halfway, then on..

The Reigate Priory Park 10K is a scenic charity fun run held in Priory Park, Reigate, Surrey. The course features a 250-meter start plus four laps on an accurately measured, gently undulating cross-country terrain surrounded by lush greenery. Suitable for runners of all levels, the event fosters a f..

Farmmageddon is an endurance running event held at Hyde Hall Farm, Buntingford, SG9 0RU. Returning for its second year, the event features a challenging 100-mile race completed over 32 hours across two days. The course consists of a 5.3 km loop combining trail, grassland, and some tarmac paths, suit..

London 2 Brighton Ultra Challenge is Ultra Challenge’s flagship Capital-to-Coast trek from Richmond to Brighton. On 23-24 May 2026, it offers a full 100km route with ~1500 m of ascent, plus shorter options of about 50km and 25km, including a Brighton 25km loop. The course traverses Surrey and Sussex..

The Fox is a RunThrough Trails event set in the Surrey countryside, offering three trail distances: 20k, 41k and 62k. Runners start at different venues—Merrist Wood College in Worplesdon (20k), West Clandon Village Hall (41k), and Burys Field in Godalming (62k)—before all finish back at Burys Field...

Grand Union Canal Race (GUCR) is a 145-mile non-stop ultramarathon along the Grand Union Canal Towpath from Gas Street Basin, Birmingham to Little Venice, London. Dubbed “The Long Run” and regarded by many as Britain’s premier ultra, the race follows a way-marked, flat towpath through urban and rura..

The Ridgeway Challenge is an 86-mile (139km) trail race along The Ridgeway National Trail, from Ivinghoe Beacon in Hertfordshire to Avebury Stones in Wiltshire. Run by Runaway Racing, it’s a historic journey along a route used for more than 5,000 years. The course is marked with permanent Ridgeway s..

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 lush countryside along the Medway Valley Walk. Runners expe..

The Beat the Sunset 50km is a multi-terrain ultramarathon held in the Thames Valley, starting and finishing at Summerleaze Park in Maidenhead, Berkshire. The flat, single-lap course covers 50 kilometers with 235 meters of elevation, featuring 75% off-road trails along the Thames Path, Jubilee River,..