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Half marathons in South Wales

Find half marathons near me in South Wales for 2024/2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

An exciting new addition to the day of running! A flat and fast course with iconic landmarks, Transporter Bridge, historic city centre, modern riverfront, natural scenery and coastal wildlife.
  • Sun 13 Apr 2025
  • £34-£44
  • Sun 13 Apr 2025
  • £34-£44
Newport, Gwent, UK

ABP Newport Wales Half Marathon

An exciting new addition to the day of running! A flat and fast course with iconic landmarks, Transporter Bridge, historic city centre, modern riverfront, natural scenery and coastal wildlife.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • 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! Charity places now available for 2025.
  • Sun 5 Oct 2025
  • 10 charities
  • Sun 5 Oct 2025
  • 10 charities
Cardiff, South Glamorgan, UK

Cardiff Half Marathon charity places

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage! Charity places now available for 2025.

  • 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
  • Sat 30 Nov
Caerphilly, Gwent, UK

Machen Trail Races: Half Marathon and Marathon | Half Marathon

  • 13.1 miles trail running
  • Sat 14 Dec
Neath, West Glamorgan, UK

Celtic Half Marathon

  • 13 miles trail running
  • Sun 26 Jan 2025
Chepstow, Gwent, UK

Chepstow Running Festival 5K, 10K & Half Marathon | Half Marathon

  • 13.1 miles road running
  • Sat 8 Feb 2025
Cardiff, UK

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

  • 13.1 miles road running
  • Sat 1 Mar 2025
Cardiff, UK

St David's Day Run | Half Marathon

  • 13.1 miles road running
  • Sat 1 Mar 2025
Cardiff, UK

St David's Day Run | 10K

  • 10 km road running
  • Sun 30 Mar 2025
Merthyr Tydfil, Mid Glamorgan, UK

San Domenico 20/10 Miler | 20 Miler

  • 20 miles road running

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