Trail Running calendar near Builth Wells 2026-2027

Trail races on the private Merthyr Mawr Estate within Merthyr Mawr Warren National Nature Reserve, featuring a 12K course and a new 40K route that extends along the Glamorgan Heritage Coast.

A guided traverse of all 14 Welsh 3000ft peaks covering about 50 km and roughly 4 000 m of ascent. Available as a 20 hour guided challenge or over two or three days with low ratio qualified mountain leaders.

Three coastal ultras on the Wales Coast Path converging at Cardiff Bay’s Norwegian Church, featuring beaches, dunes, forest singletrack, marked routes, checkpoints and live GPS tracking.

Outdoor obstacle and mud run events at Huntley Estate in July 2026, including an obstacle race, a mostly-obstacle-free mud run, and a 1 km kids race; medals and event shirts are provided for participants and marshals.

An endurance event at Huntley Estate on July 18, 2026 that pairs eight physical strength tests with 1 kilometre off-road runs after each test, with official times, medals, age group categories, parking and space for spectators.

An obstacle 5k at Worcester Racecourse on 18 July 2026 with mixed grass and pavement sections. Participants must be 13 or older, there is a £50 minimum fundraising target, and onsite facilities include toilets and refreshments.

A mountain running event on 18 July 2026 covering 15.35 km with 994 m ascent. Entrants must be 18 or older and have mountain running experience.

Multi-distance runs along the Wye Valley Greenway, including a long lit tunnel section. Mostly flat routes on former railway track with feed stations, clear marking and event medals for 5 km or longer.

Two trail races in Aymestrey, Herefordshire, both climbing to the Iron Age hillfort at Croft Ambrey. Routes are fully marked with water stations and a separate juniors 2 km race with medals.

Selworthy Beacon Fell Race on 19 July 2026 covers 4 miles with about 1000 ft of ascent and descent to Selworthy Beacon. The unmarked route starts at Bossington National Trust car park and passes through Hurlstone Combe.

A Trail 10k at Llys y Fran Lake with varied terrain, lakeside and woodland sections, chip timing and a finisher's medal. The race is the second event in the 2026 RTT Series and includes marked routes and water stations.

A new 10 km trail from Ross on Wye along the River Wye with off road terrain and riverside wildlife. Entry is £14.99 via PayPal, minimum age 15, and all finishers receive a bespoke medal.

A three day guided traverse of the Paddy Buckley Round in northern Snowdonia, covering 47 peaks over just over 100 km with about 9,000 m of ascent. Small groups return to Capel Curig each day and receive guided support and a vehicle.

A short fell race of 5.54 km with 315 m of ascent, run on a partially marked route that requires navigational skill and prior fell-running experience. Entry on the night costs £3 and the event is insured by the WFRA.

A 100 km self navigation ultramarathon across the Brecon Beacons with 3178 m of ascent, following the Beacons Way. Entrants must meet qualifying criteria including prior 50 mile ultramarathon experience and map and compass skills, places ar..

A 100 mile self navigated ultramarathon across the Brecon Beacons with 6143 m of ascent, 10 checkpoints, live GPS tracking and mandatory mountain navigation skills. Entrants must meet qualifying criteria and carry specified safety kit.

A multi-distance run along a disused railway between Ironbridge and Bridgnorth, offering distances from 9 miles to 37 miles with 9.4 mile laps and aid stations every 4.7 miles.

Multi-distance trail running in the Brecon Beacons near Abergavenny on 25 to 26 July 2026, with routes from 12 km to 110 km and UTMB Index race status for key categories.

A Britney themed 7 hour Time Challenge at Dare Valley Country Park offering distances from 3 km up to ultra and 50 km. Aid tables, medals and goody bags are provided, with free parking, toilets and a cafe on site.

A basecamp event at Dunster on 25 July 2026 offering a 50 km loop with about 1600 m of climb plus 25 km and 10 km options, all supported with marquee rest stops, GPS tracking, catering, medical cover and camping.