Course & Elevation
The Cardiff Half Marathon is a fast, predominantly flat urban course starting and finishing in Cathays Park. The route takes runners through the city centre, past iconic landmarks including Cardiff Castle, Llandaff Cathedral, and along the scenic Taff Trail, before returning through the historic Bute Park.
Course Facts
Distance 21.0975 km
Elevation Gain 145 m
Surface road
Profile Rolling
Weather on Race Day
12°C
Temperature
75%
Humidity
65%
Rain Chance
Typical Welsh autumn weather with mild temperatures and moderate rainfall risk. Runners should prepare for potentially damp conditions and layering options, though October is generally more stable than winter months.
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