- Sun 22 Jun 2025
Legend (70.3) Triathlon
06:00
Age 18 & over on 31 Dec 2025
£229.99-£249.99
- 1900 m lake swimming
- 88 km road cycling
- 21.8 km road running
Event overview
Securing your spot in the Cardiff Triathlon and 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 and Duathlon caters to all skill levels.
Don't miss out on this extraordinary event!
Highlights
Lively Event Village
Music, commentary, shopping, food and chill out zones.
Family-friendly vibes
Family finishes and plenty to see and do.
On course support
Brilliant marshals, signage and pick-up vehicles.
Welsh slate finisher mementos
Locally made to mark your achievement and provide a lasting, unique and usable memento.
Spectacular location
Cardiff's unique city architecture offers a great backdrop to your race.
Professional timing
Chip timing and online results.
This event is part of Cardiff Triathlon & Duathlon.
Event photos
Event details
- All fitness levels
- Event expo
- Event village
- Free venue entry
- Newcomers
- Spectators
- Swim hat provided
- Teams
- Traders at event
- Wetsuit not allowed if too hot
- Wetsuit required if too cold
- Bag storage
- Cafe
- Coast
- Music
- Restaurant
- Toilets
- Urban
- First aid
- Flat
- Food stations
- Marshals
- Out and back
- Sweeper
- Toilets
- Traffic free
- Water stations
- Wave start
- Way markers
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.
Once through transition, you will head out on a 54 mile (88k) fast flat bike route, completing seven 12.5k 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 Millennium Centre.
Your run is an out and back run route which you must complete five times, 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 Millennium 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, it's time for your sprint finish; along Bute Place, around the corner, and into the finish line in front of the Wales Millennium Centre.
Maps

(Bike route to be confirmed.)

Cut offs
In the interest of athlete safety and the safety of our volunteers on the course, there will be strict cut-off times in place.
- You have a total of 1 hour and 5 minutes to complete your swim.
- You have 4 hours to complete the bike course. You must be clear of the bike course no later than 5 hours and 5 minutes after the first wave starts.
- You have a total of 3 hours to complete your run.
Sustainability
- Bring your own cup
- Plastic bottle free
- Plastic-free event
- Public transport links
- Recycling
- Reusable cups
- Sustainability policy
- Chip timing
- Eco medal
- Eco t-shirt
- Event app
Prizes
Prize Categories are (for both open and female):
Individual
- Overall - Top 3
- Under 23 - Top 1
- Senior - Top 1
- Vet 40 - Top 1
- Vet 50 - Top 1
- Vet 60 - Top 1
- Vet 70 - Top 1
- Age 18 & over on 31 Dec 2025
- Entries open
- Enter online
- Pay by instalments
Entry fees
Entry fee
£229.99
Valid to 01/06/2025
Entry fee
£249.99
Valid 01/06/2025 - 20/06/2025
The Sprint distance was my first ever triathlon. I'd definitely recommend this event to anyone, and I've already entered for next year's Olympic distance. David J
This is my 3rd Cardiff Tri at Standard distance and again it did not disappoint... Itβs my hometown race and once again, Iβll still come back next year. Eleanor P
This is a very fast course with a pan flat bike and run course. The swim is also very simple... Sam A
Great event. Wanted to take part in this because of its sheer size. Glad I did it was brilliant. Darren V
Last year's Sprint was my first attempt at triathlon. I loved it so much, I entered this year's Olympic distance the following week. David J
The event itself was absolutely amazing! Loads of support even on a rainy day and the transition area in Roald Dahl Plass just made it even more special. The Swim was excellent and really fast in the calm waters of Cardiff Bay. Chris W
Loved Cardiff Tri - completed as my second Olympic distance. Registration day before was nice and easy, good set up of stalls to grab some clobber and we got socks, a cow bell, foam hand and energy bar on sign up. Sarah W
I wouldn't hesitate to recommend this one. A well organised event with a super friendly events team. Victoria W
Reviews thanks to RaceCheck
Other races at event
- Sun 22 Jun
- #1 of 6
Super Sprint Triathlon
09:00
Age 15 & over
£88.99-£93.99
- 400 m lake swimming
- 9.3 km road cycling
- 2.5 km road running
- Sun 22 Jun
- #2 of 6
Sprint Triathlon
08:15
Age 15 & over
£98.99-£123.99
- 750 m lake swimming
- 18.5 km road cycling
- 4.7 km road running
- Sun 22 Jun
- #3 of 6
Standard Triathlon (World Championship Qualifier)
07:00
Age 17 & over
£115.99-£120.99
- 1500 m lake swimming
- 40 km road cycling
- 9 km road running
- Sun 22 Jun
- #4 of 6
Standard Triathlon (Non Qualifying)
07:00
Age 17 & over
£115.99-£140.99
- 1500 m lake swimming
- 37 km road cycling
- 9 km road running
- Sun 22 Jun
- #6 of 6
Sprint Duathlon
07:30
Age 15 & over
£78.99-£83.99
- 2.5 km road running
- 18.5 km road cycling
- 4.7 km road running