Summer Triathlons
Whether you're thinking of trying out a tri or a seasoned racer, we've rounded up 6 of the best triathlons to take on this year. Why not add some swim and bike to your run this summer?
1 / London T100 Triathlon 2025
After an incredible sell out of our debut event in 2024, the London T100 returns in 2025 for another exhilarating festival of multi sport action.
The London T100 Triathlon offers a unique and unforgettable, closed-roads racing experience through the iconic city centre. A feeling that you won’t find anywhere else.
2 / The Cardiff Triathlon & Duathlon
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…
3 / The Northumbrian Full & Half Iron-Distance Triathlon
A full and half iron-distance triathlon in and around the stunning and challenging Kielder Water and Forest.
The ultimate endurance test will be open to a limited number of individuals and teams to conquer the beautiful waters, forests and terrain that give Northumberland and Kielder its unique character.
The…
4 / Dorney Lake Triathlon
The Olympic venue, Eton Dorney, offers pan flat, traffic-free roads, and a beautiful clear lake. The venue is private and specifically hired for the purpose of a traffic-free triathlon event.
Sunday 21st September 2025
Flat and very, very fast! Dorney Lake is renowned for its traffic-free, smooth tarmac course. The…
5 / Darwen Triathlon, Aquathlon & Runs
Join us for the Darwen Sprint and Standard Distance Triathlons, Aquathlons and 5k & 10k Trail races on Sunday 22nd June.
Take on a Sprint or Standard Distance Triathlon or Aquathlon around Bold Venture Park and surrounding scenic moorland, including a trail run up to the iconic Jubilee Tower!
This Triathlon is an…
6 / Lough Cutra Castle Triathlon and Multisport
Whether you’re 9 or 90 years old, a first-timer or seasoned athlete, choose from a plethora of distances in Triathlon, Duathlon, Aquabike, Aquathlon, Run and Swim races. Sign up as an individual or with a team of friends in one of our relays!
Arguably the most fun event in the series, Lough Cutra provides a fitting…
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