American Flat Track is an American motorcycle racing series. The racing series, founded and sanctioned by the American Motorcyclist Association (AMA) in 1954, originally encompassed five distinct forms of competitions including mile dirt track races, half-mile, short-track, TT steeplechase and road races. The championship was the premier motorcycle racing series in the United States from the 1950s up until the late 1970s.

Dirt track racing is a form of motorsport held on clay or dirt surfaced oval race tracks often used for thoroughbred horse racing. Dirt track racing started in the United States before World War I and became widespread during the 1920s and 1930s using both automobiles and motorcycles. Two different types of race cars dominate — open wheel racers in the Northeast and West and stock cars in the Midwest and South. While open wheel race cars are purpose-built racing vehicles, stock cars can be either purpose-built race cars or street vehicles that have been modified to varying degrees. There are hundreds of local and regional racetracks throughout the nation. The sport is also popular in Australia, New Zealand, Canada, South Africa and the United Kingdom.