Cape Flattery (Coordinates: ) 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.
Cape Flattery is the oldest permanently named feature in Washington state, being described and named by James Cook on March 22, 1778. Cook wrote: "... there appeared to be a small opening which flattered us with the hopes of finding an harbour ... On this account I called the point of land to the north of it Cape Flattery."
In 1834, the first Japanese persons known to have set foot on what (including Otokichi) is now Washington state arrived in a dismasted, rudderless ship that ran aground near Cape Flattery. The three survivors of the broken ship were held as slaves by the local Makah people. When William H. McNeill learned about them, he took them to British authorities at Fort Vancouver, under orders from John McLoughlin of the Hudson's Bay Company which controlled the site.
Fuca Pillar is a tall, almost rectangular, rock on the west side of Cape Flattery. It is named after Juan de Fuca, a Greek sailor who explored for Spain. Fuca has a doubtful claim to being the first European explorer to see the Fuca Pillar and to explore the Strait of Juan de Fuca, also named for him. The first generally accepted mention of the pillar was by John Meares in 1788.