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Cape Flattery is the northwesternmost point of the contiguous United States. It is in Clallam County, Washington on the Olympic Peninsula, where the Strait of Juan de Fuca joins the Pacific Ocean. It is also part of the Makah Reservation, and is the northern boundary of the Olympic Coast National Marine Sanctuary.
Cape Flattery can be reached from a short hike, most of which is boardwalked. The westernmost point in the contiguous United States is at Cape Alava, south of Cape Flattery in Olympic National Park. However, the westernmost tip of Cape Flattery is almost exactly as far west as Cape Alava, the difference being approximately 5 seconds of longitude, about 360 feet (110 m), at high tide and somewhat more at low tide. The Cape Flattery Lighthouse is on Tatoosh Island, just off the cape. Makah Bay and Neah Bay are on either side of the cape. Neah Bay, Washington is the closest town to the cape.