Merthyr Tydfil
Trail Running Calendar near Merthyr Tydfil 2026-2027
Explore the top trail runs near Merthyr Tydfil for 2026-2027! We've gathered 94 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2027
Timed laps of a 5.3 km out and back course at Barry Sidings Country Park on 22 August 2027, with distances from 5 km up to ultra and a seven hour limit.
September 2027
An annual non-commercial 27.4 km fell race in the Black Mountains with five checkpoints, full kit required and online entry via Fabian4.
A 12 hour Backyard Ultra on a 4.2 mile mixed trail and tarmac loop near Crickhowell, with a reverse-direction final lap to decide male and female winners.
A team relay across the Black Mountains near the Brecon Beacons of about 50 km, with teams of 5 to 10 choosing their own route and handovers.
October 2027
SAS Endurance in Talybont-on-Usk on 1-2 October 2027 offers full 64 km and half 32 km navigational routes with guided and self navigation options.
A memorial half marathon and 12k near the Neuadd Arms on 24 October 2027, mainly off-road in mountainous terrain with a cupless water policy.
November 2027
A mountain ultramarathon of 30 miles across the Brecon Beacons on 6 November 2027, based in Georgetown, Merthyr Tydfil, with marshals, checkpoints and mandatory kit checks.
July 2028
A single day ultra of about 39.7 miles along National Cycle Route 8 from Glasbury to Merthyr Tydfil. Limited field, mandatory kit and 4.0 mph cut offs; finishers receive an Afanc medal and champions receive bespoke trophies.
A point to point 34.8 mile ultra from Merthyr Tydfil to Barry Island following National Cycle Route 8. It is day six of the MTC CYMRUN series and uses preset cut offs based on a 4 mph minimum average speed.