The Women's Professional Football League (WPFL) is the original and longest operating women's professional American football league in the United States. Now with teams across the United States, the WPFL had its first game in 1999 with just two original teams: the Lake Michigan Minx and the Minnesota Vixens. Fifteen teams nationwide competed for the championship in 2006. Unlike the other women's American football franchises, the WPFL operates as a fall league and not a spring league.