Cardiff Half Marathon

A flat, fast course passing the city’s most breathtaking scenery and iconic landmarks including Cardiff Castle, the Principality Stadium, Civic Centre and stunning Cardiff Bay

Date Sunday 5th October, 2025
Distance Half Marathon
LocationCardiff Castle
Town/CityCardiff
AreaSouth Wales
OrganiserSteve Brace
WebsiteVisit website
Run For CharityGoFundMe Start Fundraising On GoFundMe

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The Oysho Cardiff Half Marathon has grown into one of the largest and most exciting road races in the United Kingdom; and is truly a Race For Everyone. It is now one of Europe’s largest half marathons and is Wales’ largest mass participation and multi-charity fundraising event.

The event has grown significantly since it was founded by Barnardo’s in 2003 when 1,500 runners took part. It now attracts a mass race field of over 27,500 registered runners alongside world-class athletes in a trio of fiercely contested men’s, women’s and wheelchair elite races.

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