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Cardiff Half Marathon 2025

One woman has their hands in the air smiling in a Diabetes UK running vest.

Register

Registration fee: £35
Minimum sponsorship: £350
Charity Place
Registration fee: free
No minimum sponsorship
I have my Own Place

Date: Sunday 5 October 2025
Location: Cardiff - Wales
Distance: Half-Marathon

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.

Charity Place

Pay a £35 registration fee to secure your charity place and then pledge to raise a minimum sponsorship of £350 by one month after the event. A charity place with us gives you dedicated fundraising and training support from our team and a free running vest.

Get a Charity Place

Already have your own place?

If you have bought your own place in the event, directly from the Hackney Half Marathon organisers, you can still join the Diabetes UK Team. You’ll get all the benefits like a free running vest, training and fundraising advice. There’s no minimum sponsorship requirement, we just ask you to raise as much as you can for us. 

Use my Own Place

Why run for Diabetes UK?

Lucy in Diabetes UK running vest holding medals.

"I had started not really knowing what I was capable of, if indeed I would be able to stay fit, well and complete it. The person that began that challenge was not the same person who finished. I had more confidence. I was stronger, fitter and believed in myself. I had enjoyed fundraising and flying the Diabetes UK flag so much that I realised I couldn’t give it up! So, I carried on running."

Lucy runs marathons in memory of her brother James, who passed away from Diabetic Ketoacidosis, you can read more about her story here.

Team Diabetes UK runners receive:

  • Dedicated fundraising and training support, including a fundraising pack, training plans and regular updates.
  • Your own personalised Diabetes UK technical running vest.
  • Exclusive access to our Facebook and Strava groups.

Next Steps:

Blue trainer with orange laces.

Visit our Training Room

It doesn't matter if you haven't done any running or you're a seasoned marathon runner, here you'll find a suitable plan to download.

 

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Join our Facebook group

Our Running Heroes Community is full of past runners, who've been and done it all before. You'll also meet others who'll be running alongside you.

 

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Check out our Fundraising Events Hub

We're with you every step of your fundraising journey so you can smash your target. Once you've signed up, we'll send you everything you need to get going.

 

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Contact us

We would love to hear from you and answer any questions you may have, just contact our fundraising events team on events.fundraising@diabetes.org.uk.

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