Question: When did the only one of the original 3 Six Flags parks to be both owned and operated by Six Flags open ?

text: Six Flags
Current properties -- Amusement parks

Six Flags Entertainment Corporation, also known as Six Flags Theme Parks or simply Six Flags, is an amusement park corporation based in the United States, with properties in Canada, Mexico, and the contiguous United States. It owns more theme parks and waterparks combined than any other amusement park company in the world, and has the seventh-highest attendance in the world. The company operates 25 properties throughout North America, including theme parks, amusement parks, water parks and a family entertainment center. In 2017, Six Flags properties hosted 30.4 million guests. Six Flags was founded in Texas on August 5, 1961 and derived its name from its first property, Six Flags Over Texas. The company maintains a corporate office in Midtown Manhattan, while its headquarters are in Grand Prairie, Texas. On June 13, 2009, the corporation filed for Chapter 11 bankruptcy protection due to crippling debt, which it successfully exited after corporate restructuring on May 3, 2010.
Name Location Year Opened Year Acquired Notes
Frontier City Oklahoma City , Oklahoma 1958 2018 Originally owned by Six Flags during Premier Parks era . Owned by EPR Properties ; operated by Six Flags since 2018
La Ronde Montreal , Quebec , Canada 1967 2001 Built for Expo 67 Emphyteutic lease from the City of Montreal through 2065
Six Flags America Largo , Maryland 1973 1999 Acquired in Premier Parks deal . Formerly known as Adventure World , and before that Wild World
Six Flags Darien Lake Darien , New York 1981 2018 Owned by Six Flags from 1999 to 2007 . Owned by EPR Properties ; operated by Six Flags since 2018
Six Flags Discovery Kingdom Vallejo , California 1968 1997 Acquired in Premier Parks deal . Initially re-branded as Six Flags Marine World , it received its current name in 2007
Six Flags Fiesta Texas San Antonio , Texas 1992 1998 Originally owned by USAA and managed by Gaylord Entertainment from 1992-1995 . Six Flags took over park management in 1996 and the park was purchased mid-season 1998
Six Flags Great Adventure Jackson , New Jersey 1974 1977 Safari Off Road Adventure is attached to the park , making Great Adventure the largest theme park in the world
Six Flags Great America Gurnee , Illinois 1976 1984 Acquired from Marriott Corporation . By acquiring this park , Six Flags gained the rights to the Warner Bros. licenses . Purchase price $ 114.5M
Six Flags Great Escape Theme Park & Lodge Queensbury , New York 1954 1996 Acquired in Premier Parks deal
Six Flags Magic Mountain Valencia , California 1971 1979 Acquired from Newhall Land and Farming Company . Purchase price $ 51M
Six Flags México Mexico City , Mexico 1982 1999 Acquired from Reino Aventura . Purchase price $ 59M
Six Flags New England Agawam , Massachusetts 1870 1997 Acquired in Premier Parks deal , formerly Riverside Park
Six Flags Over Georgia Austell , Georgia 1967 Built by Six Flags Like Six Flags Over Texas , the park is owned by a limited partnership and is managed and operated by Six Flags
Six Flags Over Texas Arlington , Texas 1961 Built by Six Flags The first Six Flags park . The park is owned by a limited partnership and is managed and operated by Six Flags
Six Flags St. Louis Eureka , Missouri 1971 Built by Six Flags Last park built by Six Flags . Originally opened as Six Flags Over Mid-America ( name changed in 1996 ) . The only original park totally owned by Six Flags