According to the book "Langhorne! No Man's Land" by L. Spencer Riggs: "With all other courses up to that time being fairground horse tracks, Langhorne was the first [one-]mile dirt track built specifically for cars". High-profile American racing clubs like the American Motorcyclist Association (AMA), American Automobile Association (AAA), and United States Auto Club (USAC) made Langhorne one of the stops on their national circuits. These events included AMA-sanctioned National Championship Motorcycle races between 1935 and 1956, AAA-sanctioned Championship Car races between 1930 and 1955, and USAC-sanctioned Championship Car races from 1956 to 1970. The USAC races featured (and were won by) notable racers such as A. J. Foyt, Mario Andretti, Al Unser, Bobby Unser, Gordon Johncock, Lloyd Ruby, and Eddie Sachs. Langhorne was also featured prominently in NASCAR's early years and hosted at least one NASCAR-sanctioned race every year from 1949 to 1957.