Iowa State Fair Parade in Des Moines
The Iowa State Fair Parade is a real, standalone event held in downtown Des Moines on the evening before the Iowa State Fair opens each August, distinct from the fairgrounds itself. Described by Wikipedia as Iowa's largest parade, it features around 200 floats, vehicles, and other performers, starting at the State Capitol Complex and traveling west on Grand Avenue to 15th Street.
The Iowa State Fair is one of the country's oldest and largest state fairs, tracing back to a modest first gathering in Fairfield, Iowa, in October 1854, before eventually settling permanently at its current fairgrounds in Des Moines in 1886.