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Half marathons in Wales in September 2025

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

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  • Sun 7 Sep
Caernarfon, Gwynedd, UK

Caernarfon Half Marathon | Caernarfon Half Marathon

  • 13.1 miles road running + 620 ft ascent
  • Sun 21 Sep
Llanwrda, Dyfed, UK

Pumsaint Trail Half Marathon | 13 Miles

  • 13 miles trail running
  • Sun 28 Sep
Haverfordwest, Pembrokeshire, UK

Pembrokeshire Half Marathon

  • 13.1 miles road running

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