Question: What national park housed a quasi-commune that arose in California in the late 1960s?

Context paragraphs:
Ahwahnee Hotel: The Ahwahnee Hotel is a grand hotel in Yosemite National Park, California, on the floor of Yosemite Valley, constructed from steel, stone, concrete, wood and glass, which opened in 1927.  It is a premiere example of National Park Service rustic architecture and was declared a National Historic Landmark in 1987.  The hotel was built by two companies that were merged when the National Park Service began leasing concessions to a single concessionaire in 1925.  The Curry Company, owned by David and Jennie Curry and the Yosemite Park Company, the owners of the Yosemite Lodge, became the new "Yosemite Park & Curry Company" headed by Donald Tressider.  The structure originally served as both a luxury hotel and the company offices of YPC&CC.  Despite financial struggles, the YPC&CC remained the concessioner for the Ahwahnee Hotel until 1993, before the National Park Service required a new concessioner to buy the YPC&CC, creating a new company, Delaware North.  Delaware North's contract ended on March 1, 2016 when The National Park Service selected Aramark as the new concessionaire.

Kings Canyon National Park: Kings Canyon National Park is a national park in the southern Sierra Nevada, in Fresno and Tulare Counties, California in the United States.  Originally established in 1890 as General Grant National Park, it was greatly expanded and renamed to Kings Canyon National Park on March 4, 1940.  Its namesake, Kings Canyon, is a rugged glacier-carved valley more than a mile (1,600 m) deep; the park also includes multiple 14000 ft peaks, high mountain meadows, swift-flowing rivers, and some of the world's largest stands of giant sequoia trees.  Kings Canyon is north of and contiguous with Sequoia National Park; the two are jointly administered by the National Park Service as the Sequoia and Kings Canyon National Parks.

Establishment of Grand Teton National Park: The establishment of Grand Teton National Park took place over a period spanning more than 50 years.  Located in the northwestern region of the U.S. state of Wyoming, Grand Teton National Park is 10 mi south of Yellowstone National Park which was established in 1872, when Wyoming, Idaho and Montana were still territories and the region was very sparsely settled.  By the late 19th century, conservationists were working to provide further protection to surrounding regions, leading President Grover Cleveland to create the Teton Forest Reserve, which included a portion of northern Jackson Hole.  By 1902, the reserve had been combined into the Yellowstone Forest Reserve, then was divided again in 1908 by President Theodore Roosevelt, establishing the Teton National Forest, which protected most of the Teton Range.  By 1907, the U.S. Bureau of Reclamation had constructed a temporary dam at the Snake River outlet of Jackson Lake.  This dam failed in 1910 and a new concrete Jackson Lake Dam replaced it by 1911.  The dam was further enlarged in 1916, raising lake waters 39 ft as part of the Minidoka Project, designed to provide irrigation for agriculture in the state of Idaho.  Though efforts to protect the Teton Range and Jackson Hole as part of an expanded Yellowstone National Park dated back to the late 19th century, proposals to construct more dams on some of the other lakes in Jackson Hole led Yellowstone National Park superintendent Horace Albright to block such efforts.  Albright was originally an advocate of the expanded Yellowstone plan which was very unpopular with local residents.  By the mid-1920s local sentiment had changed as a result of proposals for a new national park including only the Teton Range and six lakes at the base of the range.  With the general agreement of prominent Jackson Hole residents to this plan, President Calvin Coolidge signed the executive order establishing the 96000 acre Grand Teton National Park on February 26, 1929.

Charles Manson: Charles Milles Manson (born Charles Milles Maddox, November 12, 1934) is an American convicted mass murderer and former cult leader who led what became known as the Manson Family, a quasi-commune that arose in California in the late 1960s.  Manson's followers committed a series of nine murders at four locations in July and August 1969.  In 1971 he was found guilty of first-degree murder and conspiracy to commit murder for the deaths of seven people – most notably of the actress Sharon Tate – all of which were carried out by members of the group at his instruction.  Manson also received first-degree murder convictions for two other deaths.  Manson was originally sentenced to death, but his sentence was commuted to life imprisonment when California invalidated the state's death penalty statute in 1972.  He is currently serving multiple life sentences at California State Prison in Corcoran.

Arabuko Sokoke National Park: The Arabuko-Sokoke Forest is located on the coast of Kenya, 110 km north of Mombasa and is protected as a national Forest Reserve.  The Arabuko-Sokoke National Park is only a small portion of the Arabuko-Sokoke Forest Reserve, a few square kilometres in size and is located on the north-western edge of the forest.  The National Park was gazetted only in the late 1980s and in fact straddles the Forest Reserve boundary with about 50% lying outside the boundary.  This outer section actually lies outside an electric elephant fence installed in 2006/7 and is now fully inhabited by local communities to the extent that there is no sign on the ground to show where the National Park begins or ends.  The National Park doesn't add any particular protection to the forest which is the largest fragment of coastal forest (420 square km) left in East Africa, and is an area of high endemism, containing endemic mammals, birds and plants.  The Reserve, however, is jointly managed by the Kenya Forest Service, Kenya Wildlife Service, National Museums of Kenya and the Kenya Forest Research Institute and is one of the better protected forests in Kenya.  The forest was first protected as a Crown Forest in 1943, and was gazetted in the 1960s.  The forest is threatened by the desire for land by local people.  Several national and international conservation organisations are working with the Kenya Wildlife Service to protect the park.

Barker Ranch: Barker Ranch is located inside Death Valley National Park in eastern California.  Used as a mining and recreational property from the 1940s to the 1960s, it is infamous due to its association with Charles Manson and his "family".

Gilbert Stanley Underwood: Gilbert Stanley Underwood (1890–1960) was an American architect best known for his National Park lodges.  Born in 1890, Underwood received his B.A. from Yale in 1920 and a M.A. from Harvard in 1923.  After opening an office in Los Angeles that year, he became associated with Daniel Ray Hull of the National Park Service.  This led to a commission with the Utah Parks Company of the Union Pacific Railroad which was developing the parks in hopes of producing destinations for travelers.  During this time Underwood designed lodges for Cedar Breaks National Monument (now demolished), Zion National Park, Bryce Canyon National Park, and the North Rim of the Grand Canyon National Park.  His surviving Utah Parks Company buildings are considered exceptional examples of the Rustic style of architecture, and are all listed on the National Register of Historic Places.  In addition, Underwood was contracted to design Yosemite National Park's The Ahwahnee, also on the National Register and probably his greatest triumph in the Rustic style.

Kirk's Cabin Complex: The Kirk's Cabin Complex was built by homesteader Rensselaer Lee Kirk "circa" 1890 in what would become Canyonlands National Park in Utah.  Kirk was a small rancher who built a log cabin and two corrals at the location, but was unable to make a living there and abandoned the ranch after a few years.  Since that time the location was used by cowboys whose herds were grazing in the area, until the late 1960s when the national park was established.

Hodgdon Homestead Cabin: The Hodgdon Homestead Cabin was built by Jeremiah Hodgdon in 1879 in the Aspen Valley area of what became Yosemite National Park.  The two-story log cabin, measuring 22 ft by 30 ft , was located in an inholding in the park, owned by Hodgdon's descendants.  In the 1950s the family proposed to demolish the structure.  The National Park Service acquired it and moved it to its Pioneer Yosemite History Center at Wawona, where the restored cabin is part of an exhibit on early settlement and development of the Yosemite area.  In addition to housing Hogdon, the cabin housed workers on the Great Sierra Wagon Road in the 1880s, as a patrol cabin for U.S. Army troops who managed the new national park in the 1890s, and as a historic landmark at the old Aspen Valley Resort.

Manson Family: The Manson Family was a quasi-commune that arose in California in the late 1960s, led by Charles Manson.  They gained national notoriety after the infamous murder of actress Sharon Tate and four others on August 9, 1969 by Tex Watson and three other members of the Family, acting under the instructions of Charles Manson.  Group members were also responsible for a number of other murders and assaults, and the attempted assassination of President Gerald Ford.

Supporting paragraphs: Barker Ranch Charles Manson
Answer: Death Valley National Park