
The area enclosed by the Park was declared a National Monument in 1936, a Biosphere Reserve in 1984 and finally a National Park in 1994.
The name Joshua Tree was reportedly given by a band of Mormons who crossed the Mojave Desert in the mid-19th century, the tree's unique shape reminding them of a Biblical story in which Joshua reaches his hands up to the sky.
The profile of the Joshua Tree National Park (then a National Monument) was raised significantly in 1987 with the release of the best-selling U2 album The Joshua Tree, the cover of which featured evocative black-and-white photography of the Park's landscape and distinctive trees.
Two deserts, two large ecosystems whose characteristics are determined primarily by elevation, come together at Joshua Tree National Park. Below 3,000 feet, the Colorado Desert encompasses the eastern part of the park and features natural gardens of creosote bush, ocotillo, and cholla cactus. The higher, moister, and slightly cooler Mojave Desert is the special habitat of the Joshua tree. In addition to Joshua tree forests, the western part of the park also includes some of the most interesting geologic displays found in California’s deserts. Five fan palm oases also dot the park, indicating those few areas where water occurs naturally and wildlife abounds.
While it may at first appear lifeless, the desert supports a myriad of creatures that become active during the evening and early morning. Coyotes are commonly seen near the park roads making their rounds. Jackrabbits and the shy kangaroo rats emerge from their dens in the evenings to forage. Bobcats are less frequently seen, but a lucky traveler might catch one silhouetted against the moonlight. Birds in the park include burrowing owls, vultures, golden eagles, and roadrunners. Lizards, tarantulas, and rattlesnakes may be found among the rocks.
Days are typically clear with less than 25 percent humidity. Temperatures are most comfortable in the spring and fall, with an average high/low of 85 and 50°F (29 and 10°C) respectively. Winter brings cooler days, around 60°F (15°C), and freezing nights. It occasionally snows at higher elevations. Summers are hot, over 100°F (38°C) during the day and not cooling much below 75°F (24°C) until the early hours of the morning.
Trails within the park include:
The odd shapes of the Joshua Tree, as well as the dramatic geology and desert scenery, make the park a great place for photographers. As with many areas, photography is best in the early morning and late evening hours.
The park is one of the most popular rock climbing areas in the world with more than 4,500 established routes offering a wide range of difficulty. Note that there are differing regulations depending on whether a climb is being done within the designated wilderness area or not; check with a ranger for current regulations.
Joshua Tree National Park lies 140 miles east of Los Angeles. You can approach it from the west via Interstate 10 and Hwy 62 (Twentynine Palms Highway). The north entrances to the park are located at Joshua Tree Village and the city of Twentynine Palms. The south entrance at Cottonwood Spring, which lies 25 miles east of Indio, can be approached from the east or west, also via Interstate 10.
The main roads through the park are paved and easily accessible to passenger vehicles. Several dirt roads through the park may also be passable by automobiles, although conditions often require high-clearance four-wheel drive vehicles; check at the ranger stations for current road conditions.
There are numerous trails throughout the park. Be sure to carry and drink lots of water while hiking.
Many of the park trails and roads are excellent for mountain biking; check at a ranger station for options.