Triathlon  | Duathlon  | Cardiff 2025

Cardiff 2025 Standard

The Cardiff Triathlon will take you on an unforgettable journey through the iconic Cardiff Bay. This beautiful area lends itself perfectly for a spectacular triathlon experience, for both racers and spectators alike. And with the addition of the event being held on entirely closed roads, the opportunity is unique for an event such as this.


22 Jun 2025




Opening Date: 26.07.2024


Route Description

Start your race with the exclusive opportunity to swim in Cardiff Bay. Cardiff Bay is supplied by two rivers to form a 500-acre (2.0 km2) freshwater lake around the former dockland area south of the City Centre.

Standard competitors complete three 13k laps of a flat and fast course on ENTIRELY CLOSED ROADS. Heading out of transition under the shadow of the Wales Millenium Centre you will head along James Street and down Ferry Road. Taking in the sites of the Cardiff International Sports Village and along the side of the Ely you will reach the first turn around point. Flow back in the direction you’ve come, with views of the Millenium Centre, the Senedd and of course the iconic Cardiff Bay. You will then head along Lloyd George Avenue and thrill at the speed on this section, before reaching another turn around to fly down the avenue once again. The lap ends at the entrance to the Oval Basin beneath the Wales Millenium Centre.

Your run is an out and back run route which you must complete twice, giving a great opportunity to catch all the sights along the way. Head out of transition first towards the Norwegian church and along the cycle path, taking in the sites of industrial heritage that Cardiff is so renowned for. The route is flat and fast especially as you run along the Barrage. The route back gives you views of the Pierhead Building, the Wales Millenium Centre, the Senedd and so much more that you’ll have plenty to keep you motivated as you go for your PB! The lap turn around is right by the Pierhead building, where you’ll double back and head out again to the Barrage. Once you get here a second time, its time for your sprint finish; along Bute Place, around the corner and into the finish line in front of the Wales Millenium Centre.


Tier 1 Price

Ends: 28/07/2024

  • £98.99

Tier 2 Price

Ends: 01/06/2025

  • £115.99

Tier 3 Price

Ends: 20/06/2025

  • £120.99

Relay Team entry

Ends: 01/06/2025

  • £140.99

Important Information

Minimum Age


Wave Start Times


Cut Off Times


Opening Date: 26.07.2024


Are you in?

See Start List

Final Instructions

Will be sent out and available to download 1 week before the event.

We are proud that all our events are bilingual. Signs, registration and commentary are available in English and Welsh.

Event Partners Cardiff Triathlon & Duathlon 2025

Working with local communities