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Trail Marathons in Wales in December 2025

Find trail marathons in Wales in December 2025 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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The only way is up with this race along the Offas Dyke footpath. The scenery and terrain become more and more beautiful, and challenging as you go!
  • Sun 7 Dec
  • £41.50
Prestatyn, Clwyd, UK

Sea 2 Summit | Offa's Dyke Full Marathon

The only way is up with this race along the Offas Dyke footpath. The scenery and terrain become more and more beautiful, and challenging as you go!

  • Chip timing
  • Enter online
  • Age 18 & over
  • 26.2 miles trail running
  • Sat 13 Dec
Grecynon, Mid Glamorgan, UK

Celtic Trail Races | Marathon

  • 26 miles trail running + 3050 ft ascent

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