
Mid America Adventure
Theme park in Eureka, Missouri

Theme park in Eureka, Missouri
Mid America Adventure by Enchanted Parks, formerly known as Six Flags Over Mid-America and Six Flags St. Louis, is an amusement park in Eureka, Missouri, a suburb of St. Louis. Founded in 1971 by Six Flags, the park was purchased in 2026 by EPR Properties, which hired Enchanted Parks to operate it. The park was conceived in the 1960s by Six Flags founder Angus G. Wynne. Unlike his company's first two parks, it was not designed by architect Randall Duell, who was busy designing AstroWorld, but by the company itself. The park opened on June 5, 1971. It has undergone many changes, including a 1990s revamp that added two new areas and replaced or renamed all six of the park's original ones. Mid America Adventure operates from April to November. In the fall, the park hosts the Halloween-themed event Fright Fest.
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