Cardiff Half Marathon

05 Oct 2025

Sunday 05 Oct 25

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 fee: £15
  • Sponsorship target: £350

Looking for a challenge in 2025? Lace up those trainers in support of Guts UK, and head to Run For Charity to secure your spot now!

A female Guts UK brand character cheers with her hands up, wearing a hijab and a blue Guts UK t-shirt.

With your support, we can continue to fund life-changing research into the digestive system from top to tail, covering the gut, liver and pancreas. Together, we can help the UK get to grips with guts!

Why run for Guts UK?

  • To support people living with digestive conditions across the UK to get the information and support they need, when they need it.
  • You will receive your very own Guts UK running vest.
  • Support throughout your fundraising from our small but mighty team.

More about event location

Cardiff CF10 3RB, UK

Get directions
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