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Runs in Wales in May 2025

Find runs near me in Wales in May 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

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 10 - Sun 11 May
  • £92.50-£145
  • Sat 10 - Sun 11 May
  • £92.50-£145
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
  • Sat 3 May
Llanidloes, Powys, UK

The HOWUM

  • 30 miles trail running
  • Sat 10 May
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon

  • Marathon
  • Half marathon
  • Sun 11 May
Mold, Clwyd, UK

Excalibur Trail Races

  • Half marathon
  • Marathon
  • CaniCross 3
  • 10K run
  • Thu 15 - Mon 19 May
Llanidloes, Powys, UK

The Severn Challenge

  • Marathon
  • Ultra run 4
  • Sat 17 May
Merthyr Tydfil, Powys, UK

OTT Trail Marathon and 10 Mile Race - Brecon Beacons

  • Marathon 2
  • 10 miler
  • Sat 17 May
Crickhowell, Powys, UK

Tenacious Ten Hour Endurance Challenge

  • 10 hrs trail running

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