Half Marathon 2025 Uk Dates. September 30, 2025 everything you need to know about the 2025 principality cardiff half marathon. Whether you’re just starting half marathon training and are lining up an end goal, or are plowing through marathon training and looking for a half to do as part of that, we’ve picked out an array of excellent uk.
Voted the uk’s best half marathon three years in a row. The race begins on sunday, september 22, with the adults setting of at 9am in front of the guildhall.
