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Half marathons in Wales

Find half marathons in Wales in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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  • Sun 10 May 2026
Llanrwst, Clwyd, UK

Snowdonia Half Marathon

  • 13.1 miles road running
  • Sat 6 Jun 2026
Brecon, Powys, UK

Midnight Mountain Marathon | Half Marathon

  • 13.1 miles road running
  • Sun 7 Jun 2026
Swansea, West Glamorgan, UK

Swansea Half Marathon

  • 13.1 miles road running
  • Sun 12 Jul 2026
Caernarfon, Gwynedd, UK

Snowdonia Trail Half Marathon Eryri

  • 12.9 miles trail running
  • Sun 6 Sep 2026
Caernarfon, Gwynedd, UK

Caernarfon Half Marathon

  • Half marathon
  • Sun 13 Sep 2026
Llanwddyn, Powys, UK

Lake Vyrnwy Half Marathon

  • 13.1 miles road running
  • Sun 4 Oct 2026
Bangor, Gwynedd, UK

Bangor City 10K & Half Marathon | Half Marathon

  • 13.1 miles road running

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