Yosemite National Park The State of California, however, retained control of Yosemite Valley and Mariposa Grove. Muir also helped persuade local officials to virtually eliminate grazing from the Yosemite high country. The newly created national park came under the jurisdiction of the United States Army's Troop I of the 4th Cavalry on May 19, 1891, which set up camp in Wawona with Captain Abram Epperson Wood as acting superintendent. By the late 1890s, sheep grazing was no longer a problem, and the Army made many other improvements. The cavalry could not intervene to ease the worsening condition of Yosemite Valley and Mariposa Grove.
Yosemite National Park destroyed nearly $2 billion in assets and revenue, though natural woodland assets are renewable, and closed off much of the park to tourists. This fire was the third largest on record, and burned nearly 500 acres of wild habitat. During late July and early August, 2018, sections of the park, including the Valley, were temporarily closed due to the Ferguson Fire at its western boundary. The closing was the largest in almost thirty years at the park. Yosemite Valley is open year-round and numerous activities are available through the National Park Service, Yosemite Conservancy, and Aramark at Yosemite, including nature