Pinto Basin Road Under Construction; Expect travel delays up to 30-minutes
The ongoing construction project to improve Pinto Basin Road will impact travel between the northern portion of the park and the Cottonwood/I-10 area. Please plan accordingly. The project is expected to be completed in August 2014. More »
Deteriorating conditions of Black Rock Canyon Road
The road leading to Black Rock campground has deep potholes, is deeply rutted, and can be difficult to negotiate, especially in large vehicles. Please drive with caution.
Access to some Cottonwood trails remains closed
Trail access remains closed to Cottonwood Spring Oasis, Lost Palms Oasis, and Mastodon Peak. More »
Nature & Science
Joshua Tree’s nearly 800,000 acres were set aside to protect the unique assembly of natural resources brought together by the junction of three of California’s ecosystems. The Colorado Desert, a western extension of the vast Sonoran Desert, occupies the southern and eastern parts of the park. It is characterized by stands of spike-like ocotillo plants and “jumping” cholla cactus. The southern boundary of the Mojave Desert reaches across the northern part of the park. It is the habitat of the park’s namesake: the Joshua tree. Extensive stands of this peculiar looking plant are found in the western half of the park. Joshua Tree’s third ecosystem is located in the western most part of the park above 4,000 feet. The Little San Bernardino Mountains provide habitat for a community of California juniper and pinyon pine.
The plant diversity of these three ecosystems is matched by the animal diversity, including healthy herds of desert bighorn and six species of rattlesnakes. Joshua Tree National Park lies astride the Pacific flyway of migratory birds, and is a rest stop for many. It was for this unusual diversity of plants and animals that Joshua Tree National Monument was set aside on August 10, 1936.
The park also encompasses some of the most interesting geologic features found in California’s desert areas. Exposed granite monoliths and rugged canyons testify to the tectonic and erosional forces that shaped this land. Washes, playas, alluvial fans, bajadas, desert varnish, igneous and metamorphic rocks interact to form a pattern of stark beauty and ever changing complexity.
Did You Know?
Five of North America's 158 desert fan palm oases are located in Joshua Tree National Park, where fault lines force water to the surface. More...