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.
History Plans for a Six Flags park in the St. Louis area—dubbed Six Flags Over Mid-America—were announced on July 16, 1969. The park opened on June 5, 1971, the third and last of the three "true" Six Flags parks envisioned by Angus G. Wynne. The park was divided into six themed sections, each under one of the "Six Flags":
Missouri (now 1904 World's Fair), the main entry of the park, themed after the St. Louis World's Fair of 1904. U.S.A. (replaced by Time Warner Studios in 1995), in the southeast of the park, themed after the United States. France (now Chouteau's Market), to the east next to U.S.A., themed after a colonial French trading post. Spain (replaced by DC Comics Plaza in 1997), in the southwest of the park, featuring Spanish-themed architecture and restaurants. England (now Britannia), in the northwest of the park, originally themed after colonial British influence. Later themed to a village in medieval England. Illinois, in the north section of the park, originally themed to the state of the same name. Later partially replaced by Bugs Bunny National Park, with the Old Chicago sub-section beyond the train loop becoming the entirety of the area.
The Mall of Mid-Americas dedication plaque says that
The park's name was changed to Six Flags St. Louis for the 1997 season."Six Flags Begins New Season Friday", Washington Missourian, March 26, 1997, page 1B. On June 5, 1999, the 12-acre Six Flags Hurricane Harbor water park opened next to the main park, a $17 million expansion that was the largest in the park's history.
In 2014, Six Flags sold 180 acres of unused land to the east of the park to developer McBride & Sons, reducing its property area to 323 acresUnknown: including 40 acres of undeveloped land.
In January 2020, a renovation to the entry plaza removed the original ticket booths. That March, Six Flags St. Louis announced that the opening of their 2020 season would be delayed by to the COVID-19 pandemic.
Yearly attendance figures have not been released.
2026 sale and renaming to Mid America Adventure On March 5, 2026, the park's owner, Six Flags (which had merged with Cedar Fair in 2024), announced that it would sell Six Flags St. Louis and six other park properties to EPR Properties. The sale was completed on April 6, 2026. EPR hired Enchanted Parks to operate the park. The park was originally intended to retain the Six Flags branding through the 2026 season, however it would be officially renamed to Mid America Adventure on August 27, 2026, with the Six Flags St. Louis signs to be retained until 2027; it is expected that the DC Comics and Looney Tunes IP licenses will also be removed.
Areas and attractions Mid America Adventure is divided into eight themed sections, all of which were added after the park's opening or renamed. The park is laid out in a "Duell loop", a design concept that was often used by park designer Randall Duell.
1904 World's Fair 1904 World's Fair is the main area of the park, named after the Louisiana Purchase Exposition in St. Louis, which ran from April 30 to December 1, 1904. The area features the "Mall of the Mid-Americas", a shopping mall that features foods introduced or served at the fair, as well as early-1900s-themed buildings. The area was named "Missouri" until 1994.
Ride Picture Year opened Manufacturer Description American Thunder 2008 Great Coasters International A classically themed wooden roller coaster. It was named "Evel Knievel" until 2010, after the daredevil of the same name. Colossus 1986 Carousel Holland B.V. A tall ferris wheel, around 180 feet in height.The Log Flume1971Arrow Development A log flume.Tommy G. Robertson Railroad 1971Crown Metal Products Train ride.
Gateway to the West Gateway to the West is themed after the old colonial times of the state of Missouri, and alludes to locales and people that have lived in the state. The area opened in 1993, taking over a part of what was formerly the Illinois section of the park.
Ride Picture Year opened Manufacturer Description River King Mine Train 1971 Arrow Dynamics A steel roller coaster named after the River King Coal Mine. Thunder River 1983 Intamin A river rapids ride that circles the island that Mr. Freeze was built on.
Chouteau's Market Chouteau's Market is themed after a French market along the Mississippi River. It is named after Auguste Chouteau, the founder of the city of St. Louis. The area opened in 1993, replacing France. In 2014, the area was expanded to take over a piece of what had formerly been the back of Studio Backlot.
Ride Picture Year opened Manufacturer Description Spinsanity 2017 Zamperla A Zamperla Disk'O ride.
Studio Backlot Studio Backlot is themed to the backlot of a movie studio in Hollywood. The area originally opened in 1995 as "Time Warner Studios", but was renamed "Warner Bros. Backlot" the following year.
In the first couple years, the area featured five interactive movie set experiences based on various Warner Bros. films, including Bonnie and Clyde, Little Shop of Horrors and Maverick, all of which were retired after the 1997 season. The area's name was changed again to its current name in 2002, though it mostly retains its previous theme.
Ride Picture Year opened Manufacturer Description Batman: The Ride 1995 Bolliger & Mabillard An inverted roller coaster based on after Batman from DC Comics. Guests walk through an extensive queue themed after Gotham City. Ninja 1989 Arrow Dynamics/Vekoma A steel roller coaster themed after the Ninja of feudal Japan. Originally located at Expo 86 in Vancouver. The Buccaneer 1980 Intamin A swinging ship ride. Originally called The Buccaneer (1980-1994), it was then re-themed to the Joker from DC Comics from 1995 to 2023 before returning to its original name.
DC Comics Plaza DC Comics Plaza celebrates the worlds of DC Entertainment, with several attractions based on various DC characters and properties. The area opened in 1997, replacing the former Spain section of the park. One of DC Comics Plaza's most iconic features is DC Circle, a section of the ground that is designed after DC's longtime "DC Bullet" logo. The visual centerpiece of the Plaza is the Hall of Justice, which serves as the facade and entrance for Justice League: Battle for Metropolis. Directly to the opposite side is the large, snowman-themed facade of the "Snowy's Ice Cream Factory Tours", which is the entrance to Mr. Freeze: Reverse Blast. Ride Picture Year opened Manufacturer Description Justice League: Battle for Metropolis 2015Sally Corporation An interactive dark ride featuring an original story experience based on the Justice League. Hosted by Cyborg, an animatronic of whom is in the ride's station. Originally called Scooby-Doo Ghostblasters The Mystery of the Scary Swamp.Mr. Freeze: Reverse Blast 1998Premier RidesA launched roller coaster themed after Mr. Freeze and the 1997 movie Batman & Robin. Its trains originally ran facing forwards, but were changed in 2012 to run facing backwards, coinciding with its name change adding "Reverse Blast" to the title. The shoulder restraints were replaced with lap bars after the 2001 season. Shazam! 1971 Eli Bridge Company A standard scrambler ride themed after the super hero Shazam.
Britannia Britannia is based on the country of Great Britain as it was in its medieval period, including elements from Arthurian legend. The area was named "England" from 1971 to 1992, then "Great Britain" in 1993, and it was given its current name in 1994.
Ride Picture Year opened Manufacturer Description Grand Ole Carousel1972 Philadelphia Toboggan Coasters A traditional carousel that was originally named "Carousel" from 1972 to 1983. It was also named "Grand Ole Carousel" from 1984 to 1993 and "Enchanted Carousel" from 1994 to 1997. In 1998, its name was reverted back to Grand Ole Carousel. The ride underwent a multi-year refurbishment which began in 2021, and re-opened in July of 2025.Joker Carnival of Chaos2024ZamperlaA Pendulum ride. Pandemonium 2007 Gerstlauer A spinning roller coaster, the third of four installations at Six Flags theme parks. It was formerly named "Tony Hawk's Big Spin" from 2007 to 2011. Despite its location right inside the entrance of Britannia, the ride has no thematic connection to the rest of the area.Rookie Racer2023VekomaA kids' roller coaster. Supergirl: Sky Flyer 2019 Zamperla Zamperla Endeavour model, themed after Supergirl. The Boss 2000 Custom Coasters International A wooden terrain roller coaster, the tallest and fastest coaster built by Custom Coasters International. It was the eighth longest wooden roller coaster in the world when it first opened, with a track length of 5,051 feet. The helix element was removed for the 2018 season, reducing the track's length to 4,631 feet. During the 2025 pre-season, 215 feet of track was replaced with Titan Track, allowing for a smoother ride experience.
Illinois Illinois is loosely themed to the city of Chicago. The area was formerly known as "Old Chicago" from 1971 to 1993.
Ride Picture Year opened Manufacturer DescriptionBoomerang 2013 Vekoma A boomerang roller coaster. It was relocated from Six Flags Over Texas, where it operated as Flashback. Catwoman Whip 2022 Funtime Funtime Booster model, themed after Catwoman. The ride was supposed to open in 2020, but was originally delayed to 2021 due to the COVID-19 pandemic. The ride was pushed back again for the 2022 season to replace Superman Tower of Power. Fireball 2016 Larson International A "Super Loop" ride. Screamin' Eagle 1976 Philadelphia Toboggan Coasters A wooden roller coaster designed by John C. Allen. When it opened in 1976, it was the tallest, longest and fastest wooden roller coaster in the world. An American Coaster Enthusiasts landmark.SkyScreamer2011FuntimeA Star Flyer. Was the first SkyScreamer to open throughout the Six Flags parks.
Bugs Bunny National Park Bugs Bunny National Park is a kiddie area based on the Looney Tunes franchise. It opened in 2006 as the successor to Looney Tunes Town. It replaced some former land that the Gateway to the West section used to occupy.