Title: Olympic National Park
Content:  Olympic National Park is a United States national park located in the State of Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west-side temperate rainforest, and the forests of the drier east side. Within the park there are three distinct ecosystems, including subalpine forest and wildflower meadow, temperate forest, and the rugged Pacific coast. President Theodore Roosevelt originally designated the park as Mount Olympus National Monument on March 2, 1909. The monument was re-designated a national park by Congress and President Franklin D. Roosevelt on June 29, 1938. In 1976, Olympic National Park was designated by UNESCO as an International Biosphere Reserve, and in 1981 as a World Heritage Site. In 1988, Congress designated 95 percent of the park as the Olympic Wilderness.
Title: Olympic Mountains
Content:  A large portion of the range is contained within the Olympic National Park. Of this 95% is part of the Olympic Wilderness. The national park is surrounded on the south, east, and northwest sides by the Olympic National Forest, with five wilderness areas, and on the southwest side by the Clearwater State Forest with one Natural Area Preserve (Washington Department of Natural Resources), and the Quinault Indian Reservation. State parks and wildlife areas occur in the lower elevations.
Title: Olympic National Forest
Content:  Olympic National Forest is a U.S. National Forest located in Washington, USA. With an area of 628115 acre, it nearly surrounds Olympic National Park and the Olympic Mountain range. Olympic National Forest contains parts of Clallam, Grays Harbor, Jefferson, and Mason counties. The landscape of the national forest varies, from the temperate Olympic rain forest to the salt water fjord of Hood Canal to the peaks of Mt. Washington. Annual precipitation averages about 220 inches (5.6 m), giving rise to streams such as the Humptulips River. Olympic National Forest was originally created as Olympic Forest Reserve in 1897, then renamed to Olympic 
Title: Olympic National Park
Content:  As stated in the foundation document: "The purpose of Olympic National Park is to preserve for the benefit, use, and enjoyment of the people, a large wilderness park containing the finest sample of primeval forest of Sitka spruce, western hemlock, Douglas fir, and western red cedar in the entire United States; to provide suitable winter range and permanent protection for the herds of native Roosevelt elk and other wildlife indigenous to the area; to conserve and render available to the people, for recreational use, this outstanding mountainous country, containing numerous glaciers and perpetual snow fields, and a portion of the surrounding verdant forests together with a narrow strip along the beautiful Washington coast."
Title: Olympic Peninsula
Content:  The peninsula contains many state and national parks, including Anderson Lake, Bogachiel, Dosewallips, Fort Flagler, Fort Worden, Lake Cushman, Mystery Bay, Old Fort Townsend, Potlatch, Sequim Bay, Shine Tidelands, and Triton Cove state parks; Olympic National Park; and the Olympic National Forest. Within the Olympic National Forest, there are five designated wilderness areas: The Brothers, Buckhorn, Colonel Bob, Mt. Skokomish, and Wonder Mountain. Just off the west coast is the Washington Islands Wilderness.
Title: Mason County, Washington
Content: Olympic National Forest (part) ; Olympic National Park (part) 
Title: Trails of Olympic National Park
Content:  There are many diverse trails within Olympic National Park. These trails traverse many different biomes, allowing hikers to explore from the coast of the Pacific Ocean to the summit of Mount Olympus. The trails vary in length from less than a mile and a few minutes hike to many miles and multiple days. The Pacific Northwest National Scenic Trail traverses the park from east to west, and has approximately 135 miles within its borders. The trails are divided into five separate areas, Staircase/Dosewallips Trails, Hurricane/Elwha Trails, Quinault/ Queets Trails, Hoh/Bogachiel/Sol Duc Trails, and Coastal Routes.
Title: Olympic Mountains
Content:  the Olympics to determine their suitability as a national park, and was greeted in Port Angeles by more than 3000 local school children asking him to ‘give us our Olympic National Park’. He signed Olympic National Park into law in 1938. In 1953, the park was enlarged with the addition of the coastal strip, and more coastal areas along Lake Ozette were added in 1976. Also that year, UNESCO named the park an International Biosphere Reserve, and a World Heritage Site in 1981. In 1984, Congress designated 5 wilderness areas in the Olympic National Forest, and declared 95% of Olympic National Park a wilderness area in 1988.
Title: Washington (state)
Content:  Islands National Wildlife Refuge, as well as three national parks—the Olympic National Park, North Cascades National Park, and Mount Rainier National Park. The three national parks were established between 1899 and 1968. Almost 95 percent (876,517 acres, 354,714 hectares, 3,547.14 square kilometers) of Olympic National Park's area has been designated as wilderness under the National Wilderness Preservation System. Additionally, there are 143 state parks and9 national forests, run by the Washington State Park System and the United States Forest Service. The Okanogan National Forest is the largest national forest on the West Coast, encompassing 1,499,023 acre. It is managed together as the Okanogan–Wenatchee National Forest, encompassing a considerably larger area of around 3,239,404 acre.
Title: Mount Olympus (Washington)
Content:  Mount Olympus, at 7,980 ft, is the tallest and most prominent mountain in the Olympic Mountains of western Washington state. Located on the Olympic Peninsula, it is also the central feature of Olympic National Park. Mount Olympus is the highest summit of the Olympic Mountains; however, peaks such as Mount Constance and The Brothers, on the eastern margin of the range, are better known, being visible from the Seattle metropolitan area.

Question: where is olympic national park wa?
Answer: Jefferson County.