October 5, 2025

PRINCIPALITY BUILDING SOCIETY CARDIFF HALF MARATHON

Wales’ iconic road race

True True

1:05:52

Edith Chelimo, Kenya, in 2017

Women's record

27,500

Number of runners

Race capacity

0:59:30

Leonard Langat, Kenya, in 2019

Men's record

Cardiff, Wales

Since it was founded in 2003, the Principality Building Society Cardiff Half Marathon has established itself as one of the UK’s leading road races. 

With 27,500 entries selling out each year, this is now one of the biggest events in Europe – a huge achievement considering only 1,500 runners took part in the inaugural event. The route takes in all of the cities most iconic landmarks including the Principality Stadium, Cardiff Bay, the Civic Centre and Cardiff Castle. Thousands of spectators turn out to cheer on the runners in a city renowned for its sporting passion.

A series of Junior Races across the weekend give runners of all ages and ability a chance to get in on the action.

With a well-deserved reputation as one of the United Kingdom's best running events, the Principality Building Society Cardiff Half Marathon is a race that's not to be missed.

Hordes of cheering spectators line the streets of Cardiff and Cardiff Bay as runners pass by the city's leading attractions including Cardiff Castle and the Principality Stadium.

In 2016 the event cemented its status as a globally recognised race when it played host to the World Half Marathon Championships. Now, with its spot on the SuperHalfs series, this already amazing event is set to go from strength to strength.

Since it was founded in 2003, the Cardiff Half Marathon has established itself as one of the UK’s leading road races. 

With 27,500 entries selling out each year, this is now one of the biggest events in Europe – a huge achievement considering only 1,500 runners took part in the inaugural event. The route takes in all of the cities most iconic landmarks including the Principality Stadium, Cardiff Bay, the Civic Centre and Cardiff Castle. Thousands of spectators turn out to cheer on the runners in a city renowned for its sporting passion.

A series of Junior Races across the weekend give runners of all ages and ability a chance to get in on the action.

With a well-deserved reputation as one of the United Kingdom's best running events, the Cardiff Half Marathon is a race that's not to be missed.

Hordes of cheering spectators line the streets of Cardiff and Cardiff Bay as runners pass by the city's leading attractions including Cardiff Castle and the Principality Stadium.

In 2016 the event cemented its status as a globally recognised race when it played host to the World Half Marathon Championships. Now, with its spot on the SuperHalfs series, this already amazing event is set to go from strength to strength.

Ways to get involved

Event Entry

Please visit the race website. If registration is open, get your ticket.

Don’t forget to enter your SuperPassport number there.

If it’s closed, you can explore two other options to enter the race.

Race Website

Charity Place

If you'd like to run any of the six events or the whole series for charity, you can either apply for a guaranteed charity entry or use your own entry to raise funds. Our charity partners would love your support.

Charity Listings

Run & Travel

Enjoy a hassle-free journey with our official travel agents.

They will offer you a travel package that includes not only entry, but also accommodation, guides, etc.

Run & Travel

Runner Support

Race Website

Read more about the race at the race website.

Race Website

Race Support

Do you have any other questions about the race?

Contact race support.

Contact Support

What's it like to run here?

Wales’ capital is a city that can be enjoyed by any traveller, no matter what their interest. Effortlessly balancing history and modernity, it provides entertainment in all forms, including theatres, museums, excellent restaurants, and monuments. Cardiff is a master at exceeding expectations, and won’t fail to impress you with its various attractions. 

Aside from the city itself, it’s hard to not be impressed by the famous Welsh hospitality, which sees visitors treated like close friends. As soon as you leave, you’ll be counting down the days until you can return, so make sure you make the most of it while you’re there.

Top 5 things to do in Cardiff

Wales Millennium Centre

This arts centre and venue embodies Wales down to its foundations, as it’s made exclusively out of local materials including slate and wood.

Spillers Records

First opened in 1894, Spillers is officially the oldest record store in the world, and still stocks a huge range of vinyl.

Cardiff Central Market

A truly traditional experience, Cardiff’s Central Market has played host to a variety of stalls since the 18th century.

Cardiff Castle

Dating back to 50AD, Cardiff castle was remodeled in the 19th century by the hugely wealthy 3rd Marquess of Bute. The extravagant interior reflects this, and needs to be seen to be believed.

The National Museum

Houses a huge collection of art, local history, and even archaeological finds including the skeletons of woolly mammoths and dinosaurs.

Event Gallery