Cardiff Half Marathon 2025 Early Bird Tickets. Join 29,000 others at this running in castle st, cardiff cf10 1bt, uk. Cardiff half marathon entry * early bird entry :

The cardiff half marathon will return for 2025 on sunday 5 october. Registration for the 2025 cardiff half marathon opened earlier today (wednesday 9 october) with the first two waves of tickets selling out within an hour.