Cardiff Half Marathon

04 Oct 2026

Cardiff Castle , CF10 3RB

Sunday 04 Oct 26

The Cardiff Half Marathon is one of Europe’s biggest half marathons and is Wales’ largest mass-participation fundraising event. The flat route will take you past the Welsh capital’s most iconic landmarks, including Cardiff Castle, Principality Stadium  and Cardiff Bay.

With thousands of spectators expected to turn out to cheer on the runners, the atmosphere is set to be unbeatable!

Registration fees

Registration fee: £35

Minimum sponsorship: £400

Why walk or run for Guts UK?

Receive a free Guts UK t-shirt or running vest to wear during the event (or afterwards, if you’d prefer to keep it clean!)
Dedicated support is on hand from our small but mighty fundraising team.
Every pound you raise supports our vital work, which includes:
- Providing information and support for those living with digestive conditions and symptoms.
- Funding life-changing research into the whole digestive system.
- Delivering public education and awareness campaigns and events.

Already have your own place?

If you have secured your own place, we’d love you to run for Guts UK!

We’ll support you every step of the way with your fundraising. Please fill in the form below to share your details with us, and we’ll be in touch.

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This form is for people who have secured their own place in an event. If you're looking to secure a charity place in an event and raise money for Guts UK, please look at our event listings.
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