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Marathons in Wales in March 2026

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

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Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!
  • Sun 1 Mar 2026
  • £22-£35
  • Sun 1 Mar 2026
  • £22-£35
Aberdare, Mid Glamorgan, UK

St Davids Day Dragon Run | Marathon

Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!

  • Enter online
  • Age 18 & over
  • 26.2 miles trail running
  • Sun 8 Mar 2026
Burry Port, Dyfed, UK

Great Welsh Marathon Events | Full Marathon

  • 26.2 miles road running + 363 ft ascent
  • Sat 14 Mar 2026
Carmarthen, Dyfed, UK

Brechfa Trail Races: Half Marathon & Marathon | Marathon

  • 26 miles trail running

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