Events / Triathlon / Duathlon

Cardiff Triathlon & Duathlon 2025

Situated in the renowned Cardiff Bay, this triathlon & duathlon stands out as a truly memorable city race on the calendar. The event village and transition area are located on Roald Dahl Plass, right in front of the Wales Millennium Centre.

Securing your spot in the Cardiff Triathlon & Duathlon not only grants you access to one of the UK's finest city triathlons but ensures an experience beyond compare. Anticipate a meticulously planned route with closed roads, captivating global broadcast coverage, and vibrant racing atmosphere. Whether you're tackling the Super-Sprint, Sprint, Standard, 70.3 triathlon, or Sprint Duathlon, the Cardiff Triathlon & Duathlon caters to all skill levels. Don't miss out on this extraordinary event!


22 Jun 2025



Opening Date: 26.07.2024


Choose your distance

Runner by Scott Memorial Cardiff Triathlon

Cardiff 2025


22 Jun 2025

Swim: 400m

Bike: 9.3km

Run: 2.5km

Find out more Cardiff Super Sprint 2025
cardiff bike

Cardiff 2025


22 Jun 2025

Swim: 750m

Bike: 18.5km

Run: 4.7km

Find out more Cardiff Sprint 2025
IMG 3560

Cardiff 2025


22 Jun 2025

Swim: 1500m

Bike: 37km

Run: 9km

Find out more Cardiff Standard 2025
Cardiff Triathlon & Duathlon

Cardiff 2025

Legend (70.3)

22 Jun 2025

Swim: 1900m

Bike: 88km

Run: 21.8km

Find out more Cardiff Legend 70.3 Triathlon 2025
Cardiff Bike Grafitti

Cardiff 2025

Sprint Duathlon 2025

22 Jun 2025

Run 1: 2.5km

Bike: 18.5km

Run 2: 4.7km

Find out more Cardiff Sprint Duathlon 2025

What's Included

Cardiff busy event village

Lively Event Village

Music, commentary, shopping, food and chill out zones.

Cardiff Family Cheer

Family Friendly Vibes

Family finishes and plenty to see and do.

Cardiff Mount Line Marshals

On Course Support

Brilliant marshals, signage and pick up vehicles

Cardiff Slate Mockup

Welsh Slate Finisher Mementos

Locally made to mark your achievement and provide a lasting, unique and usable memento

Cardiff Run Elite Landmarks

Spectacular Location

Cardiff's unique city architecture offers a great backdrop to your race

Cardiff Triathlon Winner taking Finish Tape

Professional Timing

Chip timing & live online results

Cardiff Triathlon & Duathlon Transition

“Thank you all so much! An incredible event - absolutely loved the draft legal aspect! The course was also spot on. There needs to be more like this in the UK!”

2023 Participant

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