The Alltech FEI World Equestrian Games attracted more than half a million people over 16 days (September 25-October 10) to watch the largest sporting event in the United States in 2010. Held at the Kentucky Horse Park in Lexington, Kentucky, there were 632 athletes and 758 horses representing 58 countries competing in world championship competitions for eight equestrian disciplines. The elite devotees attending the games included members of royal families, heads of state and business and corporate leaders from around the world. Daily attendance peaked at 50,818 on October 2 for Eventing Cross Country. Other sold-out rounds of competition included reining, vaulting, dressage and para-dressage sessions. The games are held every four years and are governed by the Fédération Equestre Internationale (FEI). Alltech, an animal health and nutrition supplier, is the title sponsor.