Six Flags St. Louis is renamed Mid America Adventure

The park in Eureka, Missouri, that was called Six Flags St. Louis officially became Mid America Adventure on August 27, 2026. Its operator, Enchanted Parks, introduced a new logo and brand identity the same day and said the name honors the park's 55-year history. It is the first time since the park opened in 1971 as Six Flags Over Mid-America that its name does not include Six Flags.

The change follows the sale of the park earlier in the year. Six Flags Entertainment completed the sale of six U.S. parks to the real estate investment trust EPR Properties on April 6, 2026, and Enchanted Parks runs them for EPR. Besides the St. Louis park, the deal included Valleyfair, Worlds of Fun, Michigan's Adventure, Great Escape and Schlitterbahn Waterpark Galveston. EPR kept the right to use the Six Flags brand through the end of 2026. Enchanted Parks describes itself as the third-largest privately held regional park operator in the United States, with eight properties.

"The rebrand to Mid America Adventure is the next step in our ongoing investment in this park and community," said James Harhi, chief executive of Enchanted Parks.

What changes for visitors

The park has 10 roller coasters, among them Screamin' Eagle and The Boss, and a 12-acre water park. Some Six Flags signs are still up and will be replaced over time, park communications manager Elizabeth Gotway told St. Louis station KMOV. The water park, still called Hurricane Harbor, is due to get a new name, and the Fright Fest Halloween event will be renamed next year. The future of the Looney Tunes and DC Comics characters, used on rides such as Batman: The Ride, has not been decided; Gotway said the company's chief executive was discussing it.