 AAA held a race at Tri-State Fair Grounds in Burlington, Iowa, won by Bob Burman.Additional AAA races were held at Des Moines Speedway in Valley Junction, a one-mile (1.6 km) wooden board track, in 1915 and 1916.Only two championship car races, won by Ralph Mulford and Ralph DePalma respectively, were held at Des Moines, as the track closed and was dismantled shortly thereafter.