Skip to main content
Runs

Cardiff Half Marathon 2026

Join Team Breakthrough T1D for the Oysho Cardiff Half Marathon, one of Europe’s largest half marathons, to raise funds for type one diabetes research.
Location: Cardiff, UK Date: Sunday 4 October 2026 Price: £35

Cheer squad at side of park road supporting marathon runners raising money for type 1 diabetes

About the Cardiff Half Marathon

The Oysho 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 event!

Its flat, fast course passes all the city’s most breathtaking scenery and iconic landmarks, including Cardiff Castle, the Principality Stadium, Civic Centre and stunning Cardiff Bay. Thousands of spectators turn out to cheer on the runners in a city renowned for its sporting passion.

Run the Cardiff Half Marathon for Breakthrough T1D and help to raise funds for type one diabetes (T1D) research, bringing us one step closer to a cure.

How to enter the Cardiff Half Marathon

Register for one of our charity places in the Cardiff Half Marathon 2026  and join Team Breakthrough T1D:

Registration fee: £35 plus a small booking fee
Minimum sponsorship target: £350

Sign up now

 

Use your own place for the Cardiff Half Marathon

If you secure your own place with the race organisers or your running club, we’d be delighted to have you join Team Breakthrough T1D and we’ll support you every step of the way.

You’ll receive all the benefits of a charity place runner – with no minimum sponsorship requirement!

Register your own place

How we’ll support you

Our support includes:

  • A fundraising pack upon request
  • Fantastic stewardship
  • A Breakthrough T1D running vest*
  • Cheering materials for your family and friends

*Your Breakthrough T1D running vest will be sent to you once you create your fundraising page.

Get in touch

For more information, email Holly Cummings, Challenge and Sports Events Fundraiser.

You may also be interested in

If this event doesn’t quite fit the bill, there are loads more to choose from. Have a browse of our other running events:

Read more
Large mixed group of racers running in a marathon in a road under grey sky.
Runs
10 May 2026

Leeds Half Marathon 2026

With a fantastically vibrant atmosphere guaranteed, the Leeds Half Marathon could be right up your street.

Read more
Johnny running in marathon with pom pom support raising money for type 1 diabetes
Runs
10 May 2026

Rob Burrow Leeds Marathon 2026

The Leeds Marathon takes in some of the city's most scenic countryside and outer suburbs.

Read more
Runners in Hackney Half Marathon being cheered
Runs
17 May 2026

Hackney Half Marathon 2026

Join thousands of runners on a route that showcases the historic Broadway Market and vibrant street art of East London.

Read more
Two female Breakthrough TD1 charity marathon runners smiling
Runs
23-24 May 2026

Edinburgh Marathon Festival 2026

Join Team Breakthrough T1D for a race at Scotland’s biggest running event of the year!