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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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- Sat 14 Mar 2026
Carmarthen, Dyfed, UK
Brechfa Trail Races: Half Marathon & Marathon | Half Marathon
- 13 miles trail running
- Sun 22 Mar 2026
Merthyr Tydfil, Mid Glamorgan, UK
The Merthyr Half Marathon | Half Marathon
- 13.1 miles road running
- Sun 29 Mar 2026
Llandudno, Clwyd, UK
Llandudno Half Marathon & 10 Mile | Half Marathon
- 13.1 miles road running
- Sat 4 Apr 2026
Aberdyfi, Gwynedd, UK
Aberdyfi Half Marathon | Half Marathon
- 21.1 km trail running + 850 m ascent
- Sat 11 Apr 2026
Swansea, West Glamorgan, UK
RTT Gower Trail Half Marathon & 10K | Half Marathon
- 13.1 miles trail running
- Sat 25 Apr 2026
Haverfordwest, Pembrokeshire, UK
EnduranceLife - Pembrokeshire | Half Marathon
- 13.4 miles trail running + 1578 ft ascent
- Sat 9 May 2026
Cardiff, UK
Radyr Trail Races: Half Marathon and Marathon | Half Marathon
- 13.1 miles trail running
- Sun 10 May 2026
Llanrwst, Clwyd, UK
Snowdonia Half Marathon
- 13.1 miles road running + 1919 ft ascent
- Sat 6 Jun 2026
Brecon, Powys, UK
Midnight Mountain Marathon | Half Marathon
- 13.1 miles road running + 1425 ft ascent