Cardiff Half Marathon 2026

Guarantee your Cancer Research Wales 2026 Cardiff Half Place today - fill out the form below!

The Cardiff Half Marathon has grown into one of the largest and most exciting road races in the United Kingdom, with over 27,500 registered runners

The flat, fast course will return on 4 October 2026, and will pass all of the city’s most breath-taking scenery and iconic landmarks including Cardiff Castle, the Principality Stadium, and the stunning Cardiff Bay.

Each participant will need to commit to raising a minimum of £300 in sponsorship for this event. Shortly after registering you will be given a dedicated contact here at Cancer Research Wales who will support you through every step of this exciting journey.

Your race entry will also include:

• Bespoke fundraising pack
• Regular event updates
• Support from our #TeamCRW Running Club Facebook group
• Information on Cancer Research Wales and our latest research projects
• Branded Cancer Research Wales running t-shirt (when £50 of fundraising target has been achieved)
• An opportunity to create a brighter future for cancer patients in Wales and their families 

By registering for this event with Cancer Research Wales, you agree to the Event Participant Terms and Conditions, and agree to share your data with the event organisers and partners.