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Cardiff Half Marathon

3 October 2027 · Cardiff, United Kingdom

Enter on the race website
Half marathon21.1 km · 13.1 mi
Roadterrain
14°C57°F, typical on the day

You start outside Cardiff Castle and head toward Penarth, passing the Principality Stadium and Cardiff City Stadium, where the route passes the marina. It then crosses the barrage into Cardiff Bay and runs past the Norwegian Church, the Senedd and the Wales Millennium Centre. The organiser calls the course predominantly flat and fast, and says a qualified course measurer measured it. Stations around the route hand out water, sports drink and gel. Places come through a ballot, charity entries and other routes.

Map © Mapbox © OpenStreetMap.

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Course

The map above marks the start. The organiser publishes the full route.

See the official course map

Typical weather

14°C57°F average
50%chance of rain
19 km/h12 mph wind

Historical averages for this place and date.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.

What could you run here?

Get a predicted time for this course from a recent race result.

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