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Trail Half marathons in Wales in Spring
Find trail half marathons in Wales in Spring - 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 12 Apr 2026
- £33.50
Prestatyn, Clwyd, UK
Summit 2 Sea - The Offa's Dyke Half Marathon
Gather on the summit of Moel y Parc at over 1300ft and follow the Offa's Dyke National Trail to the coast to finish line on the beach at Prestatyn.
- Newcomers
- Enter online
- Hilly
- Event village
- Rural
- Coast
- Mountains
- Age 17 & over
- 13.8 miles trail running + 2450 ft ascent
- Sun 26 Apr 2026
- £22-£35
Aberdare, Mid Glamorgan, UK
The Nearly But Not Quite London Marathon - Wales | Half Marathon
Didn't get a ballot entry into The London Marathon 2026? Don't panic, come and run with Saturn Running instead!
- Enter online
- Age 17 & over
- 13.1 miles trail running + 0 ft ascent
- Sat 14 Mar 2026
Carmarthen, Dyfed, UK
Brechfa Trail Races: Half Marathon & Marathon | Half Marathon
- 13 miles trail running
- Sat 4 Apr 2026
Aberdyfi, Gwynedd, UK
Aberdyfi Half Marathon | Half Marathon
- 21.1 km trail running + 850 m ascent
- Sat 11 Apr 2026
Swansea, West Glamorgan, UK
RTT Gower Trail Half Marathon & 10K | Half Marathon
- 13.1 miles trail running
- Sat 9 May 2026
Cardiff, UK
Radyr Trail Races: Half Marathon and Marathon | Half Marathon
- 13.1 miles trail running