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Half marathons in Wales in May 2026

Find half marathons in Wales in May 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon | Half Marathon

  • 13.1 miles trail running
  • Sun 10 May 2026
Llanrwst, Clwyd, UK

Snowdonia Half Marathon

  • 13.1 miles road running + 1919 ft ascent

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