Trethomas
Trail Running Calendar near Trethomas 2026-2027
Explore the top trail runs near Trethomas for 2026-2027! We've gathered 109 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
November 2026
A 5.7 km fell race in Llanfoist with 485 m of ascent, limited to 120 runners and supporting local woodland restoration.
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.
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.
Timed lap event at Rhydycar, Merthyr Tydfil on 29 November 2026 with distances from 5 km to ultra on a certified tarmac course.
December 2026
Military themed timed run at Barry Sidings Country Park on 6 December 2026 with lap based distances, medals, aid station and a seven hour limit.
A coastal multi terrain 10 km race at Merthyr Mawr on 13 December 2026 with chip timing, a two hour cut off and a Christmas pudding memento.
Skirrid Xmas Hill Race is a 5.7 km fell race with 450 m ascent near Llanvihangel Crucorny on 19 December 2026; entry £10, no entries on the day.
Festive 2.5 km and 5 km runs at Dare Valley Country Park on 19 December 2026 with medals, goody bags, aid station and free parking.
Seven hour Time Challenge at Dare Valley Country Park with distances from 5 km to ultra, themed medal, bobble hat and a goody bag for finishers.
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
Lap-based timed event in Rhydycar, Merthyr Tydfil with a 5.3 km tarmac lap, distances from 5 km to ultra, timed over seven hours and a no-medal entry option.
A January off road 9.6 mile run across trails, fields and woodland with about 80 percent off road terrain. The event uses chip timing, has one water station at Littleton upon Severn and a 2.5 hour expected run time limit.
A midwinter mixed terrain 6.4 miles off-road race around Cosmeston Lakes Country Park organised by Penarth and Dinas Runners under Welsh Athletics licence.
A seven hour time challenge at Dare Valley Country Park offering distances from 3 km to 50 km, with medals, aid stations and vegan goody bags.
A 9 km fell race with 550 m ascent in the South Wales Winter Hill Series, requiring navigational skills and mandatory full kit; minimum age over 16.