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Located in the iconic Cardiff Bay, this triathlon is one of the most unforgettable city races on the calendar! You'll be part of an elite group who have swum in the world famous bay, this is followed by a fantastic, fast cycle route along completely closed roads. The triathlon is rounded off with a spectacular run along the Cardiff Bay barrage. The event village and transition (one of the most beautiful and striking in the sport) will be held on Roald Dahl Plass in front of the Wales Millennium Centre.

With Olympic, Sprint and Mini Sprint distances available, there's something for every ability at the Cardiff Triathlon!

Review summary

1 Review
  • Course
  • Organisation
  • Atmosphere


Harding W
"My daughter was a little annoyed in the the sprint as the kayak which..."
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How to enter the The Cardiff Triathlon

  1. Olympic

    Triathlon: Swim 1.5km, Bike 40km, Run 10km
    Event passed
  2. Sprint

    Triathlon: Swim 0.75km, Bike 20km, Run 5km
    Event passed
  3. Super Sprint

    Triathlon: Swim 0.4km, Run 10km, Run 2.5km
    Event passed

Event Details

What’s Included

(if not a club member, you will be required to register as a day member with Welsh Triathlon on the day of the event. This will cost £5, payable on the day)

Age Limits: Competitors must be 17 years or over to enter and take part in the full tri and 15 years or over for the sprint tri.

Your Registration Includes:

  • Event Village facilities including toilets
  • Unique and iconic transition area (Roald Dahl Plass)
  • Full route marking
  • Water stations around course
  • Free pre-event bike check
  • Mechanical support
  • Electronic chip timing
  • Family entertainment
  • Web results service
  • Pick-up wagons
  • Event photography
  • Emergency support
  • Event massage
  • Bespoke medal for all finishers
  • Fully closed roads (for both bike & run)
  • LIVE TV coverage on S4C and our jumbo screen at the event village!
  • Unique swim experience
  • Live bilingual commentary
  • Exclusive discounts (at the AAH Store)
  • We cannot allow any accompanying dogs, unless for reasons of registered disability.
  • All prizes and T shirts must be collected at registration as we cannot send on.
  • Event organisers are able to amend the course route at any time and without prior notification.
  • Wearing of wetsuits for the swim discipline will be mandatory.
  • Any irresponsible littering will result in disqualification.

Questions & answers

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The Cardiff Triathlon weather forecast

Light rain starting in the afternoon.

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Predicted lows
IconHigh chance of rain
IconModerate breeze possible, up to 11mph

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The Cardiff Triathlon reviews

5 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • H

    Harding W

    Did the Sprint in 2019

    My daughter was a little annoyed in the the sprint as the kayak which another swimmer was hanging on and pulling her along kept on going in front of her and slowing her down they should keep their distance thought they were there if people needed to stop not help them in the swim.and getting in the way