The 2011 Ironman 70.3 World Championship was a triathlon competition that was held at Lake Las Vegas in Henderson, Nevada on September 11, 2011.[1] It was sponsored by the United States Marine Corps and organized by the World Triathlon Corporation. The championship race was the culmination of the Ironman 70.3 series of events that occurred from October 1, 2010 to August 15, 2011.[1] Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.[2] The 2011 Championship marked the first year that the race was not held in Clearwater, Florida, which had hosted the race since its inception in 2006.