Ironman World Championship: Sports Illustrated's 50 greatest photos SI Staff | Oct 7, 2015Ironman World Championship: Sports Illustrated's 50 greatest photos / Ironman World Championship: Sports Illustrated's 50 greatest photosRobert Beck for Sports IllustratedRobert Oliver for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedWalter Iooss Jr. for Sports IllustratedWalter Iooss Jr. for Sports IllustratedWalter Iooss Jr. for Sports IllustratedWalter Iooss Jr. for Sports IllustratedWalter Iooss Jr. for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedDavid Walberg for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedDavid Walberg for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedRobert Beck for Sports IllustratedTracy Frankel for Sports IllustratedTracy Frankel for Sports IllustratedRobert Beck for Sports IllustratedRobert Beck for Sports IllustratedElizabeth Kreutz for Sports IllustratedElizabeth Kreutz for Sports IllustratedPublished Oct 7, 2015SI STAFF