- Deception Pass State Park is a 3,854-acre (1,560 ha) state park in Washington state. It is located on nine islands—principally Whidbey and Fidalgo islands—on either side of Deception Pass, the waterway connecting the Strait of Juan de Fuca with Skagit Bay. It includes numerous bays, inlets and other waterways that provide home for a variety of marine life and coastal Pacific Northwest flora, and the park’s undersea natural resources are protected as part of the National System of Marine Protected Areas. The park’s two sections, like its two main islands, are connected by the two spans of the Deception Pass Bridge, completed in 1934.