United States Auto Club

Since 1956, United States Auto Club (USAC) remains the most diversified motorsports sanctioning body in the world. It is the official sanctioning body of many of today's largest racing series, including its own suite of circle track series in Silver Crown, Sprint, Midget and .25 Midget racing, in addition to Road Racing, Off Road and Power Sports, boasting a competitor base of more than 17,000 at more than 1,000 sanctioned events globally.