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Trail 5K runs in Wales

Find trail 5k runs in Wales in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Didn't get a ballot entry into The London Marathon? Don't panic, come and experience this 5K event instead and earn a fantastic London-themed medal!
  • Sun 26 Apr
  • £15-£27
Aberdare, Mid Glamorgan, UK

The Nearly But Not Quite London Marathon | Wales | 5K

Didn't get a ballot entry into The London Marathon? Don't panic, come and experience this 5K event instead and earn a fantastic London-themed medal!

  • 5 km trail running
Alyn Waters is a great place for trail running! The country park is accessible, the paths easy to follow and with a variety of terrain, and with a few ups and downs to make you really earn your medal!
  • Sat 5 Dec
  • £19-£21.50
Wrexham, Clwyd, UK

Alyn Waters Winter Trails | 5K & 10K

Alyn Waters is a great place for trail running! The country park is accessible, the paths easy to follow and with a variety of terrain, and with a few ups and downs to make you really earn your medal!

  • 5K run
  • 10K run
  • CaniCross
Come and join in for the Christmas Carol Bobble Hat Run in the picturesque Dare Valley in Wales! At this event you can earn yourself a running buff as well as one of the incredible themed medals!!
  • Sun 20 Dec
  • £26-£36
Aberdare, Mid Glamorgan, UK

The Snow Globe Gallop Bobble Hat Run - Wales | 5K

Come and join in for the Christmas Carol Bobble Hat Run in the picturesque Dare Valley in Wales! At this event you can earn yourself a running buff as well as one of the incredible themed medals!!

  • 5 km trail running
The route is exactly 5K, multi-terrain in nature, with a nice mix of minor road and trail to make for an interesting run in lovely surroundings, with fantastic views. Chip timing, prizes and medal!
  • Sun 10 Jan 2027
  • £19
Ruthin, Clwyd, UK

Vale of Clwyd 5K

The route is exactly 5K, multi-terrain in nature, with a nice mix of minor road and trail to make for an interesting run in lovely surroundings, with fantastic views. Chip timing, prizes and medal!

  • 5 km multi terrain running
  • Sun 15 Mar
  • £16.99
Wrexham, Clwyd, UK

Brynkinalt Running Festival | 5K

  • 5 km trail running
  • Sun 5 Apr
  • £25
Carmarthen, Dyfed, UK

The Pendine Races | 5K

  • 5 km trail running
  • Sat 11 Apr
  • £19.95
Swansea, West Glamorgan, UK

RTT Gower Trail Half Marathon & 10K | 5K

  • 5 km trail running

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