The foundations of competitive cycling in the United States were built at its velodromes, from the early days of Major Taylor and Bobby Walthour, to the high point of the Six-Day racing era of the 1930s. Velodromes were one of the most popular sporting venues in the U.S. at that time and attracted the world’s best riders. Yet from those early days of widespread national and international popularity, the sport declined during and after World War II, with the last annual Six-Day race occurring in Madison Square Garden in 1961.