12
Road Half marathons in Wales
Find road half marathons in Wales in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
Filter by date
Filter by place
Filter by category
MapEvent listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Sun 1 Mar 2026
Anglesey, Isle of Anglesey, UK
Jones o Gymru Anglesey Half Marathon
- 13.1 miles road running + 889 ft ascent
- 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 4 Oct 2026
- £5-£60
- 12 charities
Cardiff, South Glamorgan, UK
Oysho Cardiff Half
An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!
- Families
- Carbon offset
- Venue accessible
- Recycling
- Entertainment
- Music
- Chip timing
- Flat
- PB
- Traffic free
- Fancy dress
- Event village
- Urban
- Coast
- Sustainability policy
- Public transport links
- Age 17 & over
- 13.1 miles road running + 81 m ascent
- Sun 1 Feb 2026
Cardiff, UK
The Cardiff 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon
- 13.1 miles road running
- Sun 8 Feb 2026
Llanelli, Dyfed, UK
Llanelli 10K & Half Marathon | Half Marathon
- 13.1 miles road running + 58 m ascent
- Sun 8 Mar 2026
Burry Port, Dyfed, UK
Great Welsh Marathon Events | Half Marathon
- 13.1 miles road running + 240 ft ascent
- Sun 22 Mar 2026
Merthyr Tydfil, Mid Glamorgan, UK
The Merthyr Half Marathon | Half Marathon
- 13.1 miles road running
- Sun 29 Mar 2026
Llandudno, Clwyd, UK
Llandudno Half Marathon & 10 Mile | Half Marathon
- 13.1 miles road running
- Sun 10 May 2026
Llanrwst, Clwyd, UK
Snowdonia Half Marathon
- 13.1 miles road running + 1919 ft ascent
- Sun 4 Oct 2026
Bangor, Gwynedd, UK
Bangor City 10K & Half Marathon | Half Marathon
- 13.1 miles road running