Trail Running calendar near Merthyr Tydfil 2026-2027
We have found 374 Trailruns within 80 miles of Merthyr Tydfil. See below where and when you can find the races.
0 – 100∞ km
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A 7 hour Time Challenge at Dare Valley Country Park offering flexible distances from 3km up to 50km. The event includes themed medals, finishers' goody bags with a vegan option, aid stations, free parking and basic venue facilities.
An untimed 5k and 10k mud and obstacle run at Lyons Lane Motocross LTD in Shrewsbury, featuring brook crossings, hill climbs, a mud crawl and a water slide finish; specific age and supervision rules apply for children.
Cadair X is a 13.1 mile mountain half marathon with 1165 m of ascent that climbs to the 893 m summit of Cadair Idris. The marked route crosses woodland, glacial lakes and technical summit terrain and a GPX file is available.
Join the Aberfan Memorial Run in Merthyr Tydfil to honour the 1966 victims and support the Aberfan Memorial Charity. Choose 5 km to ultra on a scenic tarmac loop along the Taff Trail with flexible start times and official timing.
A roughly 12K off-road race on 18 October 2026 that follows bridle paths along the Imber Range and passes close to the Westbury White Horse, with limited places, age and equipment restrictions, and finishing medals for all.
Keynsham Dandy is an off-road race on 18 October 2026 organised by Town and Country Harriers; the roughly 12.5 mile course starts in Keynsham and includes the revived Compton Dando route with a stream, with Race HQ at The New Inn.
Trail races at Oxwich Bay with a self-navigated half marathon plus marked 10k and 5k routes. The event is postponed and a new date will be announced.
Seven consecutive offroad race days at Pengethley Manor from 19 to 25 October 2026 with a seven hour time limit each day and distances from 5k to ultra. Each day awards a unique Halloween themed medal and a virtual option is available.
An offroad Halloween race at Pengethley Manor offering 5k, 10k, half marathon, marathon and ultra distances with a seven hour time limit. In-person and virtual entries are available and paid verified finishes receive themed medals.
Part of a Halloween race series at Pengethley Manor, The Scary Scamper offers 5k, 10k, half, marathon and ultra options on a tough off road loop with a seven hour time limit and a virtual option worldwide.
Part of a Halloween series at Pengethley Manor, The Creepy Crawl offers 5k to ultra distances on an offroad, lap-based course with a seven hour time limit. Virtual entries and themed medals are available for paid participants.
A 5k night trail at Dunkertons Park in Cheltenham where runners use head torches to light the course. Open to ages 16 and over, with prizes for top three men and women and on-site refreshments and safety rules.
An offroad event at Pengethley Manor offering 5k, 10k, half, marathon and ultra distances with a seven hour time limit, on-course laps of 2.5k and themed medals; virtual participation and a charity entry option are available.
A Halloween series race at Pengethley Manor with 5k, 10k, half marathon, marathon and ultra options and a seven hour time limit. The offroad course runs inside the manor grounds and includes a hill and vineyard sections.
A Halloween series event at Pengethley Manor offering 5k, 10k, half, marathon and ultra distances on a tough offroad course with vineyard laps. Entrants have seven hours to finish and virtual participation is available.
Day one of a two day mountain marathon at Westermill Farm, Exford, featuring a 40 km course with 1800 m of climb. Teams of two must pre-enter and the entry fee covers both race days and campsite.