Joshua Tree National Park By Ashley3Spencer 1850 Mormon Pioneers named the Joshua tree 1870 Explorers, cattlemen, and miners came to the park 1930 Homesteaders came seeking free land Aug 10, 1936 Joshua Tree Was Declared a National Monument 1970 Removal of Nonnative species 1976 Wilderness Designation 1984 Designated a Biosphere Reserve 1994 Joshua Tree became a National Park 2005 Joshua Tree inspired a song by The Eagles. 2010 53 Days where the air was considered Unhealthful
