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Duathlons in Wales in June 2026

Find duathlons in Wales in June 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 most iconic multi-sport adventure race in Wales, combining a lake swim, brutal mountain climbs and a demanding run through Snowdonia’s dramatic, awe-inspiring landscape.
  • Sun 14 Jun
  • £85.99-£449.99
Caernarfon, Gwynedd, UK

Slateman Triathlon & Duathlon

The most iconic multi-sport adventure race in Wales, combining a lake swim, brutal mountain climbs and a demanding run through Snowdonia’s dramatic, awe-inspiring landscape.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Ironman
  • Standard duathlon
  • Carbon offset
  • Recycling
  • Beginner-friendly
  • Plastic bottle free
  • Dogs allowed at venue
  • Music
  • Event village
  • Rural
  • Mountains
  • Free venue entry
  • Sustainability policy
  • Public transport links
  • Age 17 & over
Race the North Wales coast in a spectacular multi-sport challenge, combining sea air, closed roads and iconic scenery in a fast, friendly triathlon and duathlon setting.
  • Sun 28 Jun
  • £94.99-£141.99
Llandudno, Clwyd, UK

Wild Horse Brewing Co. Llandudno Triathlon & Duathlon

Race the North Wales coast in a spectacular multi-sport challenge, combining sea air, closed roads and iconic scenery in a fast, friendly triathlon and duathlon setting.

  • Sprint triathlon
  • Olympic triathlon
  • Standard duathlon
  • Beginner-friendly
  • Music
  • Event village
  • Age 15 & over

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