Motocross originated in 1924 in England and came to the United States in the mid-1960s. Motocross typically takes place off-road in deserts while supercross occurs on man-made indoor tracks. Some of the top manufacturers include Yamaha, Kawasaki, Suzuki, KTM, and Honda. The document then provides brief biographies of three prominent motocross riders: James "Bubba" Stewart, Chad Reed, and Ricky Carmichael.