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Half marathons in South Wales in September 2025

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

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An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage! Charity runners, entertainment, huge crowd support and Event Village.
  • Sun 6 Oct
  • FREE-£78
  • Entries closed
  • Sun 6 Oct
  • FREE-£78
  • Entries closed
Cardiff, South Glamorgan, UK

Cardiff Half Marathon

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage! Charity runners, entertainment, huge crowd support and Event Village.

  • 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
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
  • Sat 9 Nov
Port Talbot, West Glamorgan, UK

Margam Trail Races | Half Marathon

  • 13.1 miles trail running
  • Sat 9 Nov
Cardiff, UK

Cardiff MoRun | Half Marathon

  • 13.1 miles road running
  • Sat 9 Nov
Swansea, West Glamorgan, UK

EnduranceLife - Gower | Half Marathon

  • 14.3 miles trail 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

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