2018 Kona Underpants Run
The Ironman World Championship's wackiest race-week tradition is in the books.
Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.
The Ironman World Championship’s wackiest race-week tradition is in the books! From the fun to the funky, enjoy these images from the 2018 Kona Underpants Run.