Baby uncertainty leaves Sam Long as a doubt for what is sure to be an emotional day at IRONMAN Arizona this weekend.

From calm waters in London to leopard seal-filled seas in Antarctica, this incredible triathlon adventure has just begun.

It turned into a brilliant duel but former top pro says more and more 70.3 races are simply going to come down to the run.

Challenge Family CEO, Jort Vlam, is planning for a day when triathlon is a mainstream sport, where athletes have a choice of ...

We get the thoughts and post-race analysis from top former pro on a fascinating women's IRONMAN 70.3 Wold Championship.

Asked about his scorecard for the season, Blummenfelt was his own harshest critic: “Average I would say. It gives me ...

Never miss out with our triathlon alerts & digest. Get a dose of adventure & inspiration with Boundless. Welcome to the home of endurance sports – a haven for triathlon, swimming, cycling, and running ...

Brilliant Belgian had to overcome a bent TT extension bar, a bashed rear derailleur and a sore hip before defending his title ...

Taylor Knibb admitted she went through a rollercoaster of emotions as she bounced back from Kona heartbreak with second place ...

In one of triathlon's greatest-ever middle-distance races it was Jelle Geens who just got the better of Kristian Blummenfelt.

He's won Olympic gold and Tour de France stages but it's only now that he has become a world champion for the first time.

First world title continues to prove elusive for British star as her early charge on the run is scuppered by a calf strain.