2025 Cardiff Half Marathon
Join the Cardiff Half Marathon 2025
Date: Sunday 5 October 2025
Location: Cardiff
Distance: Half marathon
Whether you already have your own place or you'd like a charity place, join Team Cancer Research UK for the Cardiff Half Marathon 2025 and play your part in supporting vital cancer research.
How to join Team Cancer Research UK
Decide whether you'll enter with your own place or get a charity place
Sign up to get Team Cancer Research UK perks
Get fundraising for life-saving research
Get over that finish line and smash your fundraising target
About the Cardiff Half Marathon
The Cardiff Half Marathon has grown into one of the largest and most exciting road races in the United Kingdom. Its flat, fast course passes all of the city’s most breathtaking scenery and iconic landmarks including Cardiff Castle, the Principality Stadium, Civic Centre and stunning Cardiff Bay.
Join Team Cancer Research UK and take on a half marathon through the capital of Wales with an awesome atmosphere and big crowds!
Cardiff Half Marathon route map
This map is a guide only. Please visit the main event website for up-to-date details of the route
Why run for Cancer Research?
Bridie has taken on the Great North Run six times as part of Team Cancer Research UK. She fundraises in memory of her Dad, who died of bowel cancer.
My first runs were really hard, but I trained and persevered, and I got better. On the day of my first Great North Run I wore my Cancer Research UK vest with pride, I was so happy to be taking part. The atmosphere was amazing and crossing the finish line I was ecstatic! I was so proud of myself and how far I’d come. Every step is worth it. For every person we lose to cancer, it spurs me on even more to continue fundraising so that we can find a cure
The difference your money makes
100 CRUK runners taking part in the Cardiff Half Marathon
Hitting their fundraising targets to raise £64,500
Could buy a DNA sequencing machine to help learn more about cancer
Team Cancer Research UK Participants receive
A personalised Cancer Research UK running t-shirt or vest
Support with fundraising and training to help you smash your challenge
Support in the run up to the event and on the day
Support in the run up to the event and on the day
Get training support
We've teamed up with experts to give you the best training support and advice for your event. Whether it's your first time training or you're looking to smash a PB, we've got a training plan for you.
Get fundraising support
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 such as fundraising ideas, top tips, planners and posters.
Get kitted out
We worked with Scimitar to create Cancer Research UK sportswear that’s comfortable, looks great and supports our vital work. 20% of the price of these products will be paid to Cancer Research UK.
We'll be there on the day, ready and waiting to shout your name with pride, so make sure you look out for all our cheering points all along the course. Find out everything you need to know about cheer points and post-race reception.
Contact Cancer Research UK Supporter Services on 0300 123 5461 or email supporter.services@cancer.org.uk. They'll be able to help you with any queries about the event or your fundraising.
Any questions? Check out our sports events frequently asked questions.
Volunteer at the Cardiff Half Marathon
Every step we make towards beating cancer relies on every mile, every pound and every person. Play your part and join our dedicated team to support our fundraisers on the day.
Find the right event for you
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Hackney Half Marathon
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Great North Run
Sunday 7 September 2025