Iowa plays Iowa State annually for the Cy-Hawk Trophy, which began in 1977. The teams' first meeting was in 1894. The teams quit meeting after the 1934 season until they renewed their rivalry in 1977. It was in 1977 that the tradition of the Cy-Hawk Trophy began, when the Des Moines Athletic Club donated a trophy dedicated to the rivalry. It was quickly dubbed the "Cy-Hawk Trophy". Iowa leads the trophy series 30–14, and the overall series 46–22 through the 2021 season. The game is currently held in early September near Patriot Day.
