California's Great America Home Six Flags California's Great America Your experiences Sign in to track your experiences. Mar 20, 1976 Marriott's Great America Resort Opened Opened Mar 20, 1976 Marriott's Great America Theme Park Jun 1985 Marriott's Great America Renamed to Great America Opened 2004 Crocodile Dundee's Boomerang Bay Water Park 2008 Great America Renamed to California's Great America
