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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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Welcome to a 7-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.
  • Sun 21 Dec
  • £27-£40
Aberdare, Mid Glamorgan, UK

A Christmas Carol Bobble Hat Run | Wales | Half Marathon

Welcome to a 7-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.

  • Enter online
  • Age 17 & over
  • 13.1 miles road running
If you're looking to spice up your run or you need some running like you've never needed running before, then this is the event for you! Come and celebrate all things Spice Girls!
  • Sat 24 Jan 2026
  • £33-£35
Aberdare, Mid Glamorgan, UK

Spice Up Your Run | Wales | Half Marathon

If you're looking to spice up your run or you need some running like you've never needed running before, then this is the event for you! Come and celebrate all things Spice Girls!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 1014 ft ascent
Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!
  • Sun 1 Mar 2026
  • £22-£35
Aberdare, Mid Glamorgan, UK

St Davids Day Dragon Run | Half Marathon

Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running
Come and join for Dashing Dog Charity run in the beautiful Dare Valley Country Park in Wales, not only is the scenery beautiful and you will earn one of the awesome medals...
  • Sun 15 Mar 2026
  • £24-£38
Aberdare, Mid Glamorgan, UK

The Dashing Dog Charity Run - Wales | Half Marathon

Come and join for Dashing Dog Charity run in the beautiful Dare Valley Country Park in Wales, not only is the scenery beautiful and you will earn one of the awesome medals...

  • Enter online
  • Age 17 & over
  • 13.1 miles road running + 135 ft ascent
Gather on the summit of Moel y Parc at over 1300ft and follow the Offa's Dyke National Trail to the coast to finish line on the beach at Prestatyn.
  • Sun 12 Apr 2026
  • £33.50
Prestatyn, Clwyd, UK

Summit 2 Sea - The Offa's Dyke Half Marathon

Gather on the summit of Moel y Parc at over 1300ft and follow the Offa's Dyke National Trail to the coast to finish line on the beach at Prestatyn.

  • Beginner-friendly
  • Enter online
  • Hilly
  • Event village
  • Rural
  • Coast
  • Mountains
  • Age 17 & over
  • 13.8 miles trail running + 2450 ft ascent
Didn't get a ballot entry into The London Marathon 2026? Don't panic, come and run with Saturn Running instead!
  • Sun 26 Apr 2026
  • £22-£35
Aberdare, Mid Glamorgan, UK

The Nearly But Not Quite London Marathon - Wales | Half Marathon

Didn't get a ballot entry into The London Marathon 2026? Don't panic, come and run with Saturn Running instead!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and celebrate 50 years since the release of the iconic Rocky film at the incredible location in Dare Valley Park in Wales!
  • Sat 30 May 2026
  • £22-£35
Aberdare, Mid Glamorgan, UK

Rocky at 50 Run | Wales | Half Marathon

Come and celebrate 50 years since the release of the iconic Rocky film at the incredible location in Dare Valley Park in Wales!

  • Enter online
  • Age 17 & over
  • 13.1 miles road running + 0 ft ascent
Ooops I Ran It Again...who hasn't completed a race, sworn they will never run again and then booked onto another one the following day!
  • Sat 25 Jul 2026
  • £22-£35
Aberdare, Mid Glamorgan, UK

Ooops I Ran It Again - Wales | Half Marathon

Ooops I Ran It Again...who hasn't completed a race, sworn they will never run again and then booked onto another one the following day!

  • Enter online
  • Age 17 & over
  • 13.1 miles road running
An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!
  • Sun 4 Oct 2026
  • £5-£60
  • 15 charities
Cardiff, South Glamorgan, UK

Oysho Cardiff Half

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!

  • Families
  • Carbon offset
  • Venue accessible
  • Recycling
  • Entertainment
  • Music
  • Chip timing
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Coast
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running + 81 m ascent
  • Sat 13 Dec
Neath, West Glamorgan, UK

Celtic Trail Races | Half Marathon

  • 13 miles trail running + 2200 ft ascent
  • Sun 1 Feb 2026
Cardiff, UK

The Cardiff 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon

  • 13.1 miles road running
  • Sun 8 Feb 2026
Llanelli, Dyfed, UK

Llanelli 10K & Half Marathon | Half Marathon

  • 13.1 miles road running + 58 m ascent
  • Sat 28 Feb 2026
Haverfordwest, Pembrokeshire, UK

Ras Dewi Sant | Half Marathon

  • 13.1 miles trail running
  • Sun 1 Mar 2026
Anglesey, Isle of Anglesey, UK

Jones o Gymru Anglesey Half Marathon

  • 13.1 miles road running + 889 ft ascent
  • Sun 1 Mar 2026
Cardiff, UK

St Davids Day Run | Half Marathon

  • 13.1 miles road running
  • Sun 8 Mar 2026
Burry Port, Dyfed, UK

Great Welsh Marathon Events | Half Marathon

  • 13.1 miles road running + 240 ft ascent
  • 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
  • Sun 5 Apr 2026
Carmarthen, Dyfed, UK

The Pendine Races | Half Marathon

  • 13.1 miles trail running
  • 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

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