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Half marathons in Wales

Find half marathons near me in Wales for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Wales' spectacular mountain half marathon! A tough route with over 1,192m of ascent, most of which is up Wales’ highest peak, with incredible views all the way to Anglesey and a downhill finish too.
  • Sat 12 Jul
  • £44.99-£49.99
  • Sat 12 Jul
  • £44.99-£49.99
Caernarfon, Gwynedd, UK

XTERRA Snowdonia Trail Half Marathon Eryri

Wales' spectacular mountain half marathon! A tough route with over 1,192m of ascent, most of which is up Wales’ highest peak, with incredible views all the way to Anglesey and a downhill finish too.

  • Chip timing
  • Enter online
  • Mountainous
  • Age 17 & over
  • 12.9 miles trail running + 3959 ft ascent
An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!
  • Sun 5 Oct
  • 18 charities
  • Sun 5 Oct
  • 18 charities
Cardiff, South Glamorgan, UK

Oysho Cardiff Half

Secure your charity place in the Cardiff Half today. Run for charity in one of the best half marathons in the world while supporting top UK charities. Find a cause and join their team today!

  • Families
  • Carbon offset
  • Wheelchair users
  • Recycling
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Coast
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running
The only way is up with this race along the Offas Dyke footpath. The scenery and terrain become more and more beautiful, and challenging as you go!
  • Sun 7 Dec
  • £31.50
  • Sun 7 Dec
  • £31.50
Prestatyn, Clwyd, UK

Sea 2 Summit | Offa's Dyke Half Marathon

The only way is up with this race along the Offas Dyke footpath. The scenery and terrain become more and more beautiful, and challenging as you go!

  • Chip timing
  • Enter online
  • Age 17 & over
  • 13.1 miles trail running
The 'UK's most beautiful Half Marathon'! Fast run flanked by breathtaking views of Snowdonia National Park and the Menai Straits. It's no wonder this race has become a firm favourite.
  • Sun 1 Mar 2026
  • £44.99-£49.99
  • Sun 1 Mar 2026
  • £44.99-£49.99
Anglesey, Isle of Anglesey, UK

Jones o Gymru Anglesey Half Marathon

The 'UK's most beautiful Half Marathon'! Fast run flanked by breathtaking views of Snowdonia National Park and the Menai Straits. It's no wonder this race has become a firm favourite.

  • Chip timing
  • Enter online
  • Undulating
  • PB
  • Age 17 & over
  • 13.1 miles road running + 889 ft ascent
  • Sat 14 Jun
Crickhowell, Powys, UK

Black Mountains 50 & 32 Mile Ultra, Marathon & Half Marathon | Half Marathon

  • 13 miles trail running + 2738 ft ascent
  • Sun 29 Jun
Tenby, Pembrokeshire, UK

The Wales Half Marathon

  • 13.1 miles road running
  • Sun 28 Sep
Haverfordwest, Pembrokeshire, UK

Pembrokeshire Half Marathon

  • 13.1 miles road running
  • Sat 18 Oct
Port Talbot, West Glamorgan, UK

Afan Forest Half Marathon

  • 13.1 miles trail running
  • Sun 19 Oct
Llanwrtyd Wells, Powys, UK

Ron Skilton Memorial Half Marathon | Half Marathon

  • 13 miles trail running

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