Patos Island Lighthouse is an active aid to navigation overlooking the Strait of Georgia at Alden Point on the western tip of Patos Island in the San Juan Islands, San Juan County, Washington, in the

San Juan County is a county in the Salish Sea in the far northwestern corner of the U.S. state of Washington. As of the 2020 census, its population was 17,788. The county seat and only incorporated to