Deception Pass State Park

Deception Pass State Park is a nearly 4,000-acre (1,600 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.

The park's original land was a military reserve prior to its sale to the state in 1922. The park was first developed in the 1930s by crews of the Civilian Conservation Corps, who constructed a number of buildings, installations and landscape features in the National Park Service rustic style. Many of these facilities are recognized on the National Register of Historic Places. Since its establishment, with its proximity to the Seattle area and its suburbs, the park has consistently ranked as the most-visited park in the Washington State Parks system, drawing 3.4 million visitors in 2023. With more than 3 million visitors annually, it rivals some of the most popular U.S. national parks in visitors.