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Marathons in South Wales in December 2025

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

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Welcome to a 7-hour timed running event where you can run a marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.
  • Sun 21 Dec
  • £27-£40
Aberdare, Mid Glamorgan, UK

A Christmas Carol Bobble Hat Run | Wales | Marathon

Welcome to a 7-hour timed running event where you can run a marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.

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

Celtic Trail Races | Marathon

  • 26 miles trail running + 3050 ft ascent

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