Trail Running calendar near Semington 2025-2026

Beacons Way Ultra 100 Mile is a rugged ultra race across the Brecon Beacons National Park in Wales. Starting from Abergavenny Castle, the route follows the Beacons Way for about 100 miles with around 6,143 metres of ascent and 250 entrants. Runners tackle ten checkpoints, iconic peaks including Pen-..

Ultra X Wales is a multi-day trail ultramarathon set in the Brecon Beacons, starting just north of Abergavenny and weaving through the Black Mountains to the east. The 2026 event offers six distances: 110km in a single stage, 110km across two days, plus 60km, 50km, 25km, and 12km options. Runners ta..

The Maidenhead Trail Run takes place on Sunday 26th July 2026 at Summerleaze Park, Maidenhead SL6 8SP. The route loops around pathways beside Maidenhead and Cookham Commons and Summerleaze Lake. The Sports Bar at Summerleaze Park serves as the event base and is about a 10-minute walk from Furze Pla..

Pen Y Fan Challenge is a trail race organized by OTT Events Limited set in the Brecon Beacons, featuring Pen Y Fan, the highest peak in South Wales (LD3 8NL). Runners choose between 5 miles or 13 miles, both routes signed and marshalled and including a summit finish. The entry includes a medal, buff..

The EDDUM 2026 is a 50-mile trail challenge around the Epynt Way, staged by Pegasus Ultra Running. The route loops around the Sennybridge Training Area, one of the UK’s largest military training zones, tracing the boundary of the Epynt Way through Wales’ largely untouched countryside. Expect dramati..

North Downs 50 Ultra Challenge takes place on the North Downs in Surrey, starting and finishing at Loseley Park, Guildford, with 25 km and 10 km options. The 50 km loop uses the North Downs Way through Surrey hills, offering scenery and views southward with easy access from London. Participants walk..

The MTC Thames Challenge is a four-day ultramarathon along England’s Thames Path, 184 miles from the river’s source in the Cotswolds to the Thames Barrier in Greenwich. The course divides into four stages: The Cotswold Ultra (57 miles), The Oxford Ultra (49 miles), The Windsor Ultra (47 miles) and T..

The MTC Cotswold Ultra is a 57-mile Thames Path ultramarathon by Ultra Running Ltd. Starting at Kemble Station in Gloucestershire, the route heads to the source of the Thames, then retraces toward the start before moving along the Thames Path through Somerford Keynes, Cricklade, and Castle Eaton. It..

The MTC Oxford Ultra is a 49-mile point-to-point ultramarathon along the Thames Path, starting from Travelodge Oxford Abingdon Road and finishing at The Catherine Wheel in Henley-on-Thames. Runners follow the river past Donnington Bridge, Sandford Weir, Culham, Cholsey, Moulsford, Streatley, Whitchu..

The North Downs Way 100 is a 103-mile continuous trail race along the North Downs Way, from Farnham in Surrey to Ashford in Kent. It aims to finish in under 30 hours, with an 11,000-foot total ascent and a 30-hour cut-off. The course follows the North Downs Way with two deviations around the 50-mile..

The MTC Windsor Ultra is a 47-mile point-to-point ultramarathon organized by Ultra Running Ltd. It starts outside The Catherine Wheel in Henley-on-Thames and finishes outside Travelodge Kingston Central, following a Thames route from Henley to Cookham Moor, Maidenhead, Dorney, Windsor Racecourse and..

Ramsbury Gold 10km is a multi-terrain running event held near Ramsbury in Wiltshire. The race starts and finishes at Ramsbury Brewery, Stockclose Farm, Aldbourne, within the Ramsbury Estate countryside. Participants can choose the standard 10km or a Canicross 10km option, both on a scenic Wiltshire..

Two Tunnels Races in Bath, UK, organized by Relish The Great Outdoors, offer a unique set of events across a city-centre route that includes Bath’s Devonshire Tunnel (408m) and Combe Down Tunnel (1672m). Distances range from 500m Colourburst and 2km Colourburst to 5km (two waves), 10km (multiple wav..

The Summer GMU (Green Man Ultra) is a Bristol-area ultramarathon offering two distances: 45 miles (GMU45) and 30 miles (GMU30). Both races use the same clockwise course along the Community Forest Path, starting and finishing at Ashton Park School for GMU45, and starting at The White Horse in Hambroo..

The Beast of Llangattock is a trail running event on Saturday 22 August 2026 at Park Farm, Llangattock, Crickhowell, Powys. The event offers four distances, all on marked courses with GPX files available for download. 10 km (6 miles) 10 miles (16 km) 20 miles (32.5 km) 32 miles (51 km) Cut-off ti..

Black Cattle Ultra Gwartheg Duon is a South Wales ultra organized by Ridge Runners, offering two distances: 44 miles and 33 miles. Runners start from Llanthony Priory in the Black Mountains or from Abergavenny, following the Cambrian Way to Cardiff and finishing near Castle Coch in Cardiff. The rout..

The Windsor Trail Run takes place on Sunday 30 August 2026 at Alexandra Gardens, Alma Road, Windsor SL4 3HU. The event offers two race distances and was booked 119 times in the last month. 10K - £30; elevation 29 m; trail, flat Half Marathon - £34; elevation 58 m; trail, flat Group booking and T-..

Set along the River Thames at Temple Island Meadows, Henley-on-Thames, the Henley River Half Marathon, 10K & Junior Race from RunThrough UK offers a late-summer Riverside challenge. The event features three distances: half marathon (the route includes a mini lap plus two laps), 10K (one lap), and a..

The RIDUM is a 30-mile ultra marathon held in South East Wales, following the Rhymney Valley Ridgeway Walk. This challenging trail run features 4,252 feet of elevation, taking participants across ridge tops around the Caerphilly basin with stunning views of the surrounding landscape. The route inclu..

Silent Pool 10km is a guided trail run hosted by Running Adventures, starting and finishing at Silent Pool Car Park in Albury, near Guildford. The 10km route winds along North Downs Way sections and through Netley Heath forest, finishing in the village of Shere where film locations from The Holiday..