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Marathons in Wales in May 2026

Find 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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Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run?
  • Sat 30 May
  • £14-£34
Aberdare, Mid Glamorgan

Rocky at 50 Run | Wales

Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run?

  • Road run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Families
  • Beginner-friendly
  • Event village
  • Park
  • All ages
  • Sat 2 May
  • £50
Brecon, Powys

Rasus y Bannau | Marathon

  • 26.5 miles trail running
  • Sat 9 May
  • £50
Cardiff

Radyr Trail Races: Half Marathon and Marathon | Marathon

  • 26.2 miles trail running
  • Sat 16 May
  • £55-£57
Merthyr Tydfil, Powys

OTT Trail Marathon & 10 Mile Trail Run Brecon Beacons | Marathon

  • 26.2 miles trail running

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