Question: Packwood Lake is in what region of the United States?

full_context: Document 1: Pasayten Wilderness: The Pasayten Wilderness is a 531,539 acre protected area located within Okanogan National Forest and Mount Baker National Forest in Washington state, centered on the Three Forks ( ) of the Pasayten River, a tributary of the Similkameen River. Although part of the wilderness lies in Mount Baker-Snoqualmie National Forest, the largest section falls within the boundaries of Okanogan National Forest, which has responsibility for the wilderness's management. The wilderness is bordered by the Stephen Mather Wilderness to the west. The northern boundary of the wilderness is the Canada–US border. Across the border are Manning Provincial Park and Cathedral Provincial Park. The wilderness area is adjacent to the Ross Lake National Recreation Area to the west, and North Cascades National Park beyond that. The Pacific Crest National Scenic Trail has its northernmost section in this wilderness. The western part of the wilderness features dramatic views and peaks of the northern Washington Cascade Mountains while the eastern section is known for its grasslands and Alpine tundra.
Document 2: Northwestern United States: The Northwestern United States is an informal geographic region of the United States. The region consistently includes the states of Oregon, Washington, and Idaho—and usually Montana and Wyoming. Some sources include southeast Alaska in the Northwest. The related but distinct term "Pacific Northwest" generally excludes areas from the Rockies eastward.
Document 3: Olympia, Washington: Olympia is the capital of the U.S. state of Washington and the county seat of Thurston County. It was incorporated on January 28, 1859. The population was 46,478 as of the 2010 census. The city borders Lacey to the east and Tumwater to the south. Olympia is a major cultural center of the Puget Sound region. Olympia is located 60 mi southwest of Seattle, the largest city in the state of Washington, and falls within the borders of the Seattle CSA.
Document 4: Breitenbush Lake: Breitenbush Lake is a 65 acre water body on a high plateau north of Mount Jefferson in the Cascade Range in the U.S. state of Oregon. The lake, fed by seepage and small creeks, is part of the North Fork Breitenbush River watershed. It is in Marion County near its border with Jefferson County and lies within the Mount Hood National Forest and the Warm Springs Indian Reservation at an elevation of about 5500 ft .
Document 5: Vancouver, Washington: Vancouver is a city on the north bank of the Columbia River in the U.S. State of Washington, and the largest suburb of Portland, Oregon. Incorporated in 1857, it is the fourth largest city in the state, with a population of 161,791 as of April 1, 2010 census. Vancouver is the county seat of Clark County and forms part of the Portland-Vancouver metropolitan area, the 23rd largest metropolitan area in the United States. Originally established in 1825 around Fort Vancouver, a fur-trading outpost, the city is located on the Washington–Oregon border along the Columbia River, directly north of Portland. In 2005, "Money" magazine named it No. 91 on its list of best places in America to live. In 2016, WalletHub ranks Vancouver the 39th best place to live for families in the US.
Document 6: Lake Chelan-Sawtooth Wilderness: The Lake Chelan-Sawtooth Wilderness is a 153,057 acre protected wilderness area located within the Okanogan and Wenatchee national forests in Washington State. The wilderness borders Lake Chelan National Recreation Area and North Cascades National Park and the Stephen Mather Wilderness to the northwest. It was designated with the passage of the Washington Wilderness Act of 1984, on lands occupied by the old Chelan Division of the Washington Forest Reserve, now part of both the Okanogan and Wenatchee national forests.
Document 7: Seattle: Seattle ( ) is a seaport city on the west coast of the United States. It is the seat of King County, Washington. With an estimated 704,352 residents as of 2016 , Seattle is the largest city in both the state of Washington and the Pacific Northwest region of North America. In July 2013, it was the fastest-growing major city in the United States and remained in the Top 5 in May 2015 with an annual growth rate of 2.1%. In July 2016, Seattle was again the fastest-growing major U.S. city, with a 3.1% annual growth rate. The city is situated on an isthmus between Puget Sound (an inlet of the Pacific Ocean) and Lake Washington, about 100 mi south of the Canada–United States border. A major gateway for trade with Asia, Seattle is the fourth-largest port in North America in terms of container handling as of 2015 .
Document 8: Packwood Lake: Packwood Lake is a freshwater lake in the Gifford Pinchot National Forest in the Cascade Mountains of Washington. It is located near the town of Packwood and is a popular day hiking and overnight camping area. The southern half of the lake lies within the Goat Rocks Wilderness area.
Document 9: Luna Lake (Washington): Luna Lake is located in North Cascades National Park, in the U. S. state of Washington. Situated 1 mi southwest of Luna Peak which is the tallest mountain in the rugged Picket Range, Luna Lake is a proglacial lake impounded by the moraine of a retreated glacier.
Document 10: Tacoma, Washington: Tacoma ( ) is a mid-sized urban port city in and the county seat of Pierce County, Washington, United States. The city is on Washington's Puget Sound, 32 mi southwest of Seattle, 31 mi northeast of the state capital, Olympia, and 58 mi northwest of Mount Rainier National Park. The population was 198,397, according to the 2010 census. Tacoma is the second-largest city in the Puget Sound area and the third largest in the state. Tacoma also serves as the center of business activity for the South Sound region, which has a population of around 1 million.
Document 11: Pacific Northwest: The Pacific Northwest (in the United States, commonly abbreviated as PNW), sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and (loosely) by the Cascade Mountain Range on the east. Though no agreed boundary exists, a common conception includes the U.S. states of Oregon and Washington and the Canadian province of British Columbia. Broader conceptions reach north into Alaska and Yukon, south into northern California and east to the Continental Divide, thus including Idaho, Western Montana, and western Wyoming. Idaho, Wyoming, and Montana are more accurately termed the Inland Northwest (INW), as the climate, folia, fauna, and politics are different than in the Pacific Northwest, as well as a different time zone in all but North Idaho. Narrower conceptions may be limited to the northwestern US or to the coastal areas west of the Cascade and Coast mountains. The variety of definitions can be attributed to partially overlapping commonalities of the region's history, geography, society, and other factors.
Document 12: La Wis Wis Guard Station No. 1165: La Wis Wis Guard Station No. 1165 in Gifford Pinchot National Forest near Packwood, Washington was built by the Civilian Conservation Corps. It is a 1-1/2-story wood-frame structure on a concrete foundation. It was designed by the Region 6 architects of the United States Forest Service in Rustic style.
Document 13: Washington (state): Washington ( ), officially the State of Washington, is a state in the Pacific Northwest region of the United States. Named after George Washington, the first President of the United States, the state was made out of the western part of the Washington Territory, which had been ceded by Britain in 1846 in accordance with the Oregon Treaty in the settlement of the Oregon boundary dispute. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital. Washington is sometimes referred to as Washington State to distinguish it from Washington, D.C., the capital of the U.S., which is often shortened to Washington.
Document 14: Midway High Lakes Area: Midway High Lakes Area, also known as High Lakes Area is a United States Forest Service designated area located in Washington’s Cascade Mountains. It lies on a high plateau on Mount Adams' northwestern flank. It is between the Goat Rocks on the north and Mount Hood to the south and contains Takhlakh Lake along with several other lakes. The area offers five scenic high elevation lakes all within a seven mile radius. It is administered by the Gifford Pinchot National Forest. While even the most visited areas at Mount Adams pale in comparison to nearby St. Helens or Rainier, it is by its own standards one of the most popular recreational areas around Mount Adams. Some of the lakes offers photogenic views of Mount Adams from across the lake.
Document 15: University of Washington: The University of Washington (commonly referred to as UW, simply Washington, or informally "U-Dub") is a large, public flagship research university in Seattle, Washington, established in 1861.
ground_truth: Pacific Northwest