- At Deception Pass in northwestern Washington, an elegant, arching, steel structure spans a crystal-blue strait flanked by craggy knobs of rock. The bridge here connects Whidbey and Fidalgo Islands along State Route 20 and is one of the most photographed bridges in the State. The land on both sides of the pass belongs to Deception Pass State Park, where you can camp, paddle, hike the rugged shores, or hunt for critters in the tide pools. The rocks exposed here are clearly the centerpiece of the park’s beauty. These rocks tell a story that spans millions of years, starting with their formation on the ocean floor and followed by the arrival of the ice age glaciers which slowly carved their mark into the landscape. The rocks here continue to evolve as the natural forces of wind and water etch patterns onto the exposed surfaces of the dark lavas.