Merthyr Mawr
Trail Running Calendar near Merthyr Mawr 2026-2027
Explore the top trail runs near Merthyr Mawr for 2026-2027! We've gathered 93 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
November 2026
A 7 hour time challenge at Dare Valley Country Park with flexible lap distances from 3 km to 50 km, themed medals, distance pins, goody bags and aid stations.
A hilly 13.6 km cross country race around Ilfracombe, usually held on the last Sunday in November; entries for 2026 open 1 September.
Two trail distances on 28 November 2026 around Machen, featuring wooded single track, ridgeway exposure and steep climbs. The half course is fully marked while the marathon requires self navigation with marshals at key points.
Lap-based timed event at Parc Taf Bargoed on 28 November 2026 offering flexible distances from a 5.3 km lap up to ultra, with medal and no medal entry options.
Forest orienteering at Weston Woods with eight courses from 1.0 km to 5.4 km, organised by Bristol Orienteering Klub and entered online via Pre entries.
Final race of the 2026 RTT Series in Afan Forest offering 5 km and 10 km trail routes with chip timing, medals and water stations at Bryn Bettws Lodge.
December 2026
Nighttime orienteering on Mumbles Hill as part of the SBOC Winter League, a local club league event near Swansea with coaching available and no dogs allowed.
Urban MapRun score event in Port Tennant with a 60 minute map and 30 checkpoints worth 10 to 30 points; free entry and timing via the MapRun app.
A just over 6 mile December dune race at Merthyr Mawr with a midrace mulled wine and mince pie stop and organised charity fundraising.
A festive charity trail run in Llangennith offering 5 km and 10 km routes, with proceeds to Morgans Army and an entry fee of £10.
Free club time trial on 16 December 2026 at Penllergare Valley Woods with staggered starts on 5 km and 2 km courses.
A family-friendly festive run at Dare Valley Country Park offering 2.5 km and 5.0 km routes, themed medals, a visit from Santa, and seasonal refreshments.
A 7 hour Time Challenge at Dare Valley Country Park with bobble hat medals, goody bags and distances from 3 km up to 50 km and ultra options.
SBOC Winter League 5 Christmas Special at Crymlyn Burrows on 20 December is a local orienteering event with two courses, entry fees from £3 and a Christmas theme.
Timed lap based run at Barry Sidings Country Park offering distances from 5 km to ultra on a 5.3 km tarmac lap with a 7 hour limit.
January 2027
A MapRun score event in Ystradgynlais where competitors use the MapRun app and have 60 minutes to visit as many of 30 checkpoints as possible.
A roughly 6.4 mile mixed terrain off road race within Cosmeston Lakes Country Park, organised by Penarth and Dinas Runners and licensed by Welsh Athletics.