South Whidbey State Park is a public recreation area consisting of 381 acres of old-growth forest and tidelands with 4,500 feet of shoreline on Admiralty Inlet along the west shore of Whidbey Island in Island County, Washington. The state park contains many mature specimens of western red cedar, Douglas fir, Sitka spruce, and western hemlock, some of the largest on Whidbey Island, including a giant cedar over 500 years old.