The Dayton Triangles were an original franchise of the American Professional Football Association (now the National Football League) in 1920. The Triangles were based in Dayton, Ohio, and took their nickname from their home field, Triangle Park, which was located at the confluence of the Great Miami and Stillwater Rivers in north Dayton. They were the longest-lasting traveling team in the NFL (1920–1929), and the last such "road team" until the Dallas Texans in 1952, who coincidentally descended from the Dayton franchise.