Sunday 5 October 2025
Cardiff
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.
Charity places have now sold out for the 2025 Cardiff Half Marathon. You can still join the waiting list and we will contact you if a place becomes available. Entry fee: £10 Minimum fundraising target: £300
Once you've secured your own place in the Cardiff Half Marathon, use it to join Team Cancer Research UK and fundraise for vital cancer research. No extra entry fee, you'll have already paid the event organiser. Set your own fundraising target.
Step: 1
Decide whether you'll enter with your own place or get a charity place
Step: 2
Sign up to get Team Cancer Research UK perks
Step: 3
Get fundraising for life-saving research
Step: 4
Get over that finish line and smash your fundraising target
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!
Download route map(JPG, 257 KB)
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
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.
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.
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.
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. Our volunteer opportunities for the marathon are now closed, however we have plenty of other events that need your support.
