5
Half marathons in South Wales in March 2026
Find half marathons in South Wales in March 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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- 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
- 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
- Sun 22 Mar 2026
Merthyr Tydfil, Mid Glamorgan, UK
The Merthyr Half Marathon | Half Marathon
- 13.1 miles road running