Cardiff Half Marathon
5th October 2025
Raise money for a cause you care about in the 2025 Cardiff Half Marathon.
Start fundraising
With Principality Cardiff Half Marathon you can guarantee beautiful scenery, iconic landmarks and historic buildings. The flat route is ideal for seasoned runners and for those looking to take on their first half-marathon challenge! It’s also the largest road race in Wales, with over 27,500 runners each year.
Are you ready to raise money for amazing charities and clock up those miles in the city’s must-do event? Smash your finish time and your fundraising target with JustGiving. We’ve got practical fundraising advice and handy guides, so you can focus on what’s important – crossing the finish line of this iconic race.
Getting started
Start fundraising for a charity
Choosing a charity to raise money for can seem difficult. Whichever incredible charity you choose to support, you’ll be raising money for an amazing cause. Once you’ve completed the event, you can collect your finishers medal and celebrate in the event village!
Get a place
Sign up to get a place in the Principality Cardiff Half Marathon or apply for a charity place.
Raise money for charity
Millions of people are already fundraising for their fave
charities on JustGiving. Set up your page in minutes.
CARDIFF HALF MARATHON fundraisers
Join these difference-makers
Jonathan’s Cardiff Half
Dad-of two, Jonathan, took part in the Cardiff Half Marathon as a thank you to the Charity that helped save his life following a mountain bike accident.
Ashmole & Co’s Cardiff Half
A team of staff from Ashmole & Co, one of south Wales’ largest accountancy firms, ran the Cardiff Half Marathon to help raise funds for the DPJ Foundation, a mental health charity.
Hamish’s Cardiff Half
Rosie, a Jack Russell adopted from Dogs Trust, joined her owner, Hamish, on his final few training runs as he prepared to take on the Cardiff Half Marathon for the charity.
Your story starts here
Find a cause you believe in and make good things happen.