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Half marathons in South Wales in March 2025

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

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  • 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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