Cardiff Half Marathon
Cardiff Castle, Penarth and Cardiff Bay anchor a fast SuperHalfs course backed by one of Britain’s strongest half-marathon crowds and a large field.
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Cardiff Half Marathon quick facts
- SuperHalfs series race with a strong elite field.
- Mostly flat route through Cardiff Bay and around Roath Park Lake.
- Ballot entry, with charity and international alternatives.
- Four-hour course limit.
About the Cardiff Half Marathon
Cardiff combines a deep international field with a large mass-participation race and strong spectator support. Entry is ballot-led, with charity, business and international alternatives once the main allocation closes.
Cardiff Half Marathon course description
The mostly flat route starts outside Cardiff Castle, runs through Penarth and across the barrage into Cardiff Bay, then loops Roath Park Lake before finishing at the Civic Centre. The measured road course favors speed without losing its city landmarks.
Weather for the Cardiff Half Marathon
Early October in Cardiff is usually cool enough for racing, but rain and coastal wind are realistic. The later morning start can also make mild days feel warmer by the closing miles.
Past Cardiff Half Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, October 4, 2026 | — | — |
| 2025 | Sunday, October 5, 2025 | Completed | Open results |
| 2024 | Sunday, October 6, 2024 | Completed | Open results |
Cardiff Half Marathon FAQ
When is the Cardiff Half Marathon?
The 2026 Cardiff Half Marathon is on Sunday, October 4, 2026.
How do I register for the Cardiff Half Marathon?
You can register for the Cardiff Half Marathon at cardiffhalfmarathon.co.uk.
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