Cardiff Half Marathon

Since it was founded in 2003, the Cardiff Half Marathon has established itself as one of the UK’s leading road races and one of the biggest events in Europe.

Run the 2025 Cardiff Half Marathon for CCLG!

Since it was founded in 2003, the Cardiff Half Marathon has established itself as one of the UK’s leading road races and one of the biggest events in Europe. The iconic route takes in all of the city’s most famous landmarks including Cardiff Bay, the Civic Centre and Cardiff Castle. Expect cheering crowds and entertainment for all the family on the day, to add to the excitement.

About the Cardiff Half Marathon

Runners: 27,500

Surface: Road

Start: 10:00am

Course: Flat

Temp: 9-15 degrees Celsius

Register for the 2026 Cardiff Half Marathon today!

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About the Cardiff Half Marathon