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5K runs in Wales in December 2025

Find 5k runs 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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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 6 Dec
  • £17.50-£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!

  • Families
  • Newcomers
  • Dogs allowed at venue
  • Event village
  • Park
  • Age 11 & over
  • 5K run
  • 10K run
  • CaniCross
Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is coming, and so is the most magical 5K fun run of the year!
  • Sat 20 Dec
  • £9
Aberdare, Mid Glamorgan, UK

Santa Run Wales | 5K

Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is coming, and so is the most magical 5K fun run of the year!

  • Enter online
  • Traffic free
  • All ages
  • 5 km trail running
Come and join the day of running and aim to complete a 5K at your own pace on a scenic course then receive a bobble hat, themed medal and goody bag at the finish!
  • Sun 21 Dec
  • £27-£32
Aberdare, Mid Glamorgan, UK

A Christmas Carol Bobble Hat Run | Wales | 5K

Come and join the day of running and aim to complete a 5K at your own pace on a scenic course then receive a bobble hat, themed medal and goody bag at the finish!

  • Enter online
  • Age 12 & over
  • 5 km road running
  • Sun 7 Dec
Swansea, West Glamorgan, UK

The Great Christmas Fun Run | 5K

  • 5 km road running

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