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5K runs in South Wales in December 2025

Find 5k runs in South 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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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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