Trail Running calendar near Semington 2025-2026

Chiltern Hills 100K is a TRA-licensed 100-kilometre ultramarathon organized by Runaway Racing. The next edition takes place in May 2026, starting and finishing in Chesham, Buckinghamshire, with the event base at Chesham Guides HQ in Lowndes Park. The anticlockwise route traces beloved Chilterns trai..

Westcountry Ultra Hilly 50 is a 50-mile trail ultra run by Albion Running, starting and finishing at West Somerset College in Minehead, Somerset. The route climbs about 7,337 ft, taking in North Hill and Bossington Hill, Culbone with the UK’s smallest parish church, Porlock Weir, and Dunkery Beacon,..

Westcountry Ultra 100 Miler is Albion Running's signature 100-mile event, held in Somerset, England. The race fuses the Flat 50 and Hilly 50 routes into one epic loop from Taunton to Minehead, largely along the Taunton–Bridgwater canal path, River Parrett Trail, and West Somerset Coast Path. Runners..

Sid Valley Ring Half Marathon, hosted by Climb South West, follows the Sid Valley Ring walking route in East Devon. The Half Marathon is an uphill-start loop through quiet lanes, footpaths and coastal scenery, climbing to 236m before descending to Sidbury, Harcombe, and the coast path with views ove..

Endurancelife Exmoor, held in the western reaches of Exmoor National Park near Martinhoe, offers four distances: 10K (6.3 miles), Half Marathon (13.3 miles), Marathon (26.5 miles), and Ultra (31.8 miles). The route is billed as one of the toughest in the Endurancelife Series, delivering a true endur..

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..

North Downs Way 50 is a 50-mile point-to-point ultramarathon along the North Downs Way National Trail, from Farnham, Surrey to Knockholt Pound on the outskirts of Greater London. With about 5,600 feet of elevation gain, the mostly off-road route traverses iconic chalk downs, including Box Hill, and..

OTT Marathon & 10 Mile Race takes place at Parkwood Dolygaer, Merthyr Tydfil, in the Brecon Beacons. The event offers two distances: a looped mountain marathon of about 26.2 miles with steep climbs and stunning views, and a 10-mile option that follows part of the same course to Checkpoint 1 before r..

The Compton Marathon & 16 Mile Challenge, part of the Compton Downland Challenge, is hosted by Compton Harriers Running Club in Compton, Berkshire. The event offers two routes: a marathon and a 16-mile challenge, both starting from the village recreation ground by the Village Hall (HQ). With a 7-hou..

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..

True Grit Trail Half Marathon takes place at Bridgend Miniature Railway Centre in Aberkenfig, Tondu, near Bridgend (CF32 0EH). The 13.1-mile route is described as epicly challenging, with mixed terrain, killer hills, a Quarry section known as the Hill of Doom, and a technical downhill forestry trail..

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..

RunThrough Trails presents The Fox, a quintessentially British trail running experience set in the picturesque Surrey countryside. On Saturday 23 May 2026, the event offers three distances: 20K, 41K, and 62K, with all routes finishing at Burys Field in Godalming. Courses launch from Burys Field, Wes..

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..

Beat The Sunset 50km Ultra Marathon takes place in Maidenhead, Berkshire, starting and finishing at Summerleaze Park. The 50-kilometre, multi-terrain course runs a flat, single loop along the Thames Path, Jubilee River and the Green Way, with about 235m of elevation and roughly 75% off-road surface...

Rocky at 50 Run - Wales is a 7 hour time challenge held at Dare Valley Country Park in Aberdare. Runners may choose their own distance during the event, with a minimum official finish distance of 3 km. Finishers who complete at least 3 km receive a themed finisher medal, and distance pins are award..

Surrey Hills Half Marathon is a guided trail half marathon based in Guildford, Surrey, covering about 13 miles. The route travels through the Surrey Hills, with highlights including St Martha's Church and hill, the village of Shere, and views from Newlands Corner and Hackhurst Downs, including secti..

The VOGUM 2026 is a 40-mile ultra running challenge along the scenic Wales Coast Path, stretching from Porthcawl to Penarth in the Vale of Glamorgan. This event offers runners a chance to experience golden beaches, dramatic cliffs, and historic sites like Ogmore Castle and the famous stepping stones..

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 that showcase stunning coastal and countryside scenery, inc..

Two Tunnels Races in Bath, UK offer a unique city-centre running experience beneath the city via the Devonshire Tunnel (408m) and Combe Down Tunnel (1672m)—the longest underground section of any UK race. The well-lit, surfaced tunnels form a flat, shared-use path starting and finishing at Brickfield..