What Happened to Six Flags Great America?

Six Flags Great America began its journey as Marriott's Great America, opening its gates to the public on May 29, 1976, as one of two identical Americana-themed parks built by the Marriott Corporation. The park, situated between Chicago and Milwaukee in Gurnee, Illinois, quickly became a popular regional destination. However, Marriott's foray into the theme park business proved less profitable than anticipated, leading the hospitality giant to divest from its amusement park division.

A pivotal moment arrived in May 1984 when Bally Manufacturing, the then-parent company of Six Flags, acquired the Gurnee park for $114.5 million. Renamed Six Flags Great America for the 1984 season, this acquisition also granted Six Flags the rights to use Warner Bros.' Looney Tunes characters across its parks, a significant branding advantage. Under Six Flags' ownership, the park underwent substantial expansion, shifting its focus towards major attractions and thrill rides.

Throughout the late 20th and early 21st centuries, Six Flags Great America continuously added record-breaking roller coasters and themed areas, solidifying its reputation as 'The Thrill Capital of the Midwest.' Notable additions included Batman: The Ride in 1992 and the re-theming of Yankee Harbor to DC Universe in 2022. The park consistently ranks among the top 20 most-visited amusement parks in North America, with an estimated 3.05 million visitors in 2024.

A major corporate restructuring occurred on July 1, 2024, when Six Flags Entertainment Corporation merged with competitor Cedar Fair, forming a new entity that retained the Six Flags Entertainment Corporation name. This merger brought Six Flags Great America under the umbrella of one of North America's largest amusement park operators. In the immediate aftermath of the merger, the park continued its investment in new attractions, debuting 'Wrath of Rakshasa,' a Bolliger & Mabillard Dive Coaster featuring the world's steepest drop and most inversions, on May 31, 2025.

As of April 25, 2026, Six Flags Great America is celebrating its 50th anniversary season. The park officially reopened on this date, kicking off a milestone year with extensive celebrations planned from June 20 through August 9, 2026. These celebrations include a new nighttime spectacular, a nightly drone show, a 'legacy museum' with historic artifacts, and special food and beverage offerings. In preparation for the anniversary, the park demolished its old entrance plaza for a new building in April 2024 and removed the Winner's Circle Go Karts in January 2026. The Camp Cartoon area was also cleared in February 2026, making way for future developments, though a previously announced new kids' area for 2026 has been delayed to 2027. Additionally, a new 'Fast Lane' virtual queue system is being introduced in 2026, replacing the Flash Pass.