It all started as a way for Canadian Roch Frey and his partner Paul Huddle to get their athletes to relax a couple of days before the Ironman Championship – it’s grown to become a fundraising event that is a mainstay during the week of activities at the Ironman World Championship.

The Underpants Run routinely attracts thousands of participants and even more spectators who watch as athletes, their families, fans and friends enjoy a couple of kilometres of running, lots of calisthenics and stretching, and even more fun a couple of days before the world’s biggest long-distance triathlon. Enjoy our photo gallery from the event!

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