Joshua Tree National Monument is in a mountainous part of the desert region of southern California. The geographic center of the monument is about 130 miles east of Los Angeles, Calif.; the area Investigated, covering almost 1,000 square miles in area, is included between 115?20' and 116?28' west longitude, and 33?04 ' and 34?07' north latitude.
Additional publication details
USGS Numbered Series
Ground-water and related geology of Joshua Tree National Monument, California