7
Flat Half marathons in Wales
Find flat 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.
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- Sun 4 Oct 2026
- £5-£60
- 15 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 29 Mar 2026
Llandudno, Clwyd, UK
Llandudno Half Marathon & 10 Mile | Half Marathon
- 13.1 miles road running