Occtopus•

Cardiff Half Marathon

Date: 05th Oct 2025

Minimum Age: 17

CF10 3RB

The Cardiff Half Marathon has grown into one of the largest and most exciting road races in Europe. It is Wales’ largest mass-participation and multi-charity fundraising event and the second largest half in the UK. Its flat, fast course passes all the city’s most breath-taking scenery and iconic landmarks including Cardiff Castle, the Principality Stadium, Civic Centre and stunning Cardiff Bay. Thousands of spectators turn out to cheer on the runners in a city renowned for its sporting passion.

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Cardiff Half Marathon

Founded in 2003 by consultants and former patients of Oxford University Hospitals, Occtopus, or the Oxford Colon Cancer Trust charity, is a leading Inflammatory Bowel Disease and Colorectal Cancer charity. The charity pioneers new treatments for colorectal cancer, colitis and Crohn’s and influences how they are treated across the NHS and funds breakthrough national and international research to improve patient outcomes and care.
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Register for Cardiff Half Marathon

You will be charged £114.40 (£110.00 + Booking Fee) for your place.

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You will be charged £114.40 (£110.00 + Booking Fee) for your place
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