The Olympic Peninsula in western Washington is a vast and varied landscape bounded by the Pacific Ocean, the Strait of Juan de Fuca, and Hood Canal. Centered on the Olympic Mountains, with Mount Olympus as its highest peak, it includes coastline, major salmon rivers, temperate rain forests, and drier northeastern areas shaped by a mountain rain shadow. Covering about 3,600 square miles, it contains Olympic National Park as well as other protected lands, and includes Cape Alava and Cape Flattery. Because of its rugged terrain, much of the peninsula remained unmapped until surveys between 1898 and 1900. It remains a major focus of habitat and waterway conservation.