Cardiff Half Marathon 2026 | Cancer Research UK

The Cardiff Half Marathon is a flat, fast 13.1-mile road race through Cardiff, with a route built around the city’s landmark streets and sights. It draws a large field and sits among the biggest road races in the United Kingdom, so it is a mass-participation half rather than a small club event. Cancer Research UK runners can join with their own confirmed race place or, when charity entries are available, run as part of Team Cancer Research UK. Charity places carry a small entry fee and a fundraising target, while runners using their own place can set up a fundraising page without paying an extra charity entry fee.