Traffic and travel is expected to be higher than usual, particularly around 10:00 to 13:00 due to the Cardiff Half-Marathon on Sunday 05 Oct 2025.

Travel to and from venue via Cathedral Road to the M4 will not closed and will remain open.

We advise attendees to arrive early to avoid impact of the traffic.

Read more about the traffic and road closure around Cardiff at https://www.cardiffhalfmarathon.co.uk/event-info/road-closures/