Mystic Lake can refer to: Mystic Lake (California) Mystic Lakes (Boston, Massachusetts), a series of lakes in Boston Mystic Lake (Washington), in Mount Rainier National Park Mystic Lake (Marstons Mills), in Marstons Mills, Massachusetts Mystic Lake (Beaverhead County, Montana) in Beaverhead County, Montana Mystic Lake (Gallatin County, Montana) in Gallatin County, Montana Mystic Lake (Stillwater County, Montana) in Stillwater County, Montana Mystic Lake Casino, a casino on the Shakopee-Mdewakanton Indian Reservation near Shakopee and Prior Lake, Minnesota