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Marathons in Wales in March 2026
Find marathons in 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 | 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 18 & over
- 26.2 miles trail running
- Sun 15 Mar 2026
- £24-£38
Aberdare, Mid Glamorgan, UK
The Dashing Dog Charity Run - Wales | 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 18 & over
- 26.2 miles road running + 135 ft ascent
- Sun 8 Mar 2026
Burry Port, Dyfed, UK
Great Welsh Marathon Events | Full Marathon
- 26.2 miles road running + 363 ft ascent
- Sat 14 Mar 2026
Carmarthen, Dyfed, UK
Brechfa Trail Races: Half Marathon & Marathon | Marathon
- 26 miles trail running