Mariposa Big Tree Grove
On October 1, 1890 Yosemite National Park was established and on June 11, 1906 Yosemite Valley and Mariposa Grove were added. Today the park encompasses 747,956 acres, about the size of Rhode Island. Although the valley may at times seem like a city in RI, there are over 700,000 acres of designated Wilderness to explore.