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Runs in Wales in May 2026

Find runs 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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The finish line is unique to you: 24 hours after the mass start, the race shall stop and the Solo Runners and Teams furthest South on the National Trail, shall be declared winners.
  • Sat 9 - Sun 10 May 2026
  • £95.50-£155.50
Prestatyn, Clwyd, UK

24 Hours South | The Offa's Dyke Ultra

The finish line is unique to you: 24 hours after the mass start, the race shall stop and the Solo Runners and Teams furthest South on the National Trail, shall be declared winners.

  • Newcomers
  • Chip timing
  • Enter online
  • GPS tracking
  • Event village
  • Rural
  • Age 18 & over
  • 24 hrs trail running + 8561 ft ascent
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon

  • Half marathon
  • Marathon
  • Sun 10 May 2026
Llangollen, Clwyd, UK

Llangollen Trail 10K & Kids 1 Mile Race

  • Fun run
  • 10K run
  • Sun 10 May 2026
Caerphilly, Gwent, UK

Bryn Meadows Caerphilly 10K & Caerphilly 2K

  • Fun run
  • 10K run
  • Sun 10 May 2026
Llanrwst, Clwyd, UK

Snowdonia Half Marathon

  • 13.1 miles road running + 1919 ft ascent
  • Sun 24 May 2026
Newtown, Powys, UK

Newtown 10K Run

  • 10 km road running

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