Yosemite National Park Timeline By allievanleuven 1850 The Indian War took place in Mariposa County Jun 30, 1864 The Yosemite Grant Act was signed by President Lincoln 1868 John Muir entered Yosemite Valley 1879 The Golden Crown Mine was established Oct 1, 1890 Yosemite was made a National Park 1903 Teddy Roosevelt came to Yosemite and loved the beauty that he saw there 1906 The San Francisco earthquake shakes up the park 1918 Had the first female park ranger Oct 31, 1984 Made a World Heritage Site 2014 The El Portal fire destroyed 4,689 acres of forest