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Half marathons in Cardiff

Find half marathons near me in Cardiff for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.

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An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!
  • Sun 5 Oct
  • FREE-£45
Cardiff, South Glamorgan, UK

Oysho Cardiff Half

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!

  • Families
  • Carbon offset
  • Wheelchair users
  • Recycling
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Coast
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running + 81 m ascent
MoRunning brings everyday people together with the focus being to inspire you, your family, your kids and your friends to have the best time running! Get ready for the half marathon, Cardiff!
  • Sat 8 Nov
  • £30-£35
Cardiff, UK

Cardiff MoRun | Half Marathon

MoRunning brings everyday people together with the focus being to inspire you, your family, your kids and your friends to have the best time running! Get ready for the half marathon, Cardiff!

  • Chip timing
  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles road running
  • Sun 16 Nov
Cardiff, UK

Cardiff Trail Half Marathon

  • 13.1 miles trail running
  • Sun 1 Feb 2026
Cardiff, UK

The Cardiff 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon

  • 13.1 miles road running
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon | Half Marathon

  • 13.1 miles trail running

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