Six Flags White Water Marietta, Georgia 1983 1999 Located about 15 miles from Six Flags Over Georgia. Six Flags Hurricane Harbor Oklahoma City Oklahoma City, Oklahoma 1981 2018 Located a short 15 miles from Frontier City, the park is owned by EPR Properties and is operated by Six Flags. Six Flags Hurricane Harbor Rockford Cherry Valley, Illinois 1984 2019 Owned by Rockford Park District, will be operated by Six Flags under a ten-year lease agreement ($425,000/year) beginning April 1, 2019.