When
Oct 04, 2026
Starts at 9:00am BST
Weather
Weather During Race
🌤️ Mostly clear
· Wind 6 km/h
Registration
Registration Closed
Closed October 19, 2025
Website
Official website →
Event Details
The 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.
Event type
Half-Marathon
Distance
21.1 km
Surface
Road
Registration opens
September 30, 2025
Registration closes
October 19, 2025
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