The United States Congress designated the Joshua Tree Wilderness (map
) in 1976 and it now has a total of 594,502 acres
All of this wilderness is located in California
and is managed by the National Park Service.
The Joshua Tree Wilderness is bordered by
the Sheephole Valley Wilderness
to the north and the Pinto Mountains Wilderness
to the north.
The California Desert Protection Act of 1994 transformed Joshua Tree National Monument into a national park and expanded the wilderness. The additions thrust north into the Pinto Mountains, northeast into the Coxcomb Mountains, southeast into the Eagle Mountains, and southwest into the Little San Bernardino Mountains. Most of the park away from road corridors is Wilderness, a fabulous meeting place of two desert ecosystems. The lower, drier Colorado Desert dominates the eastern half of the park, home to abundant creosote bushes, the spidery ocotillo, and the "jumping" cholla cactus. The slightly more cool and moist Mojave Desert covers the western half of the park, serving as a hospitable breeding ground for the undisciplined Joshua tree. You'll find examples of a third ecosystem within the park: five fan-palm oases, where surface or near-surface water gives life to the stately palms. By day, you might spy bighorn sheep on mountainous slopes, numerous lizards lazing in the heat, and eagles soaring in bright sunlight. Still, it's nighttime that truly brings the desert to life, with tarantulas, rattlesnakes, coyotes, jackrabbits, bobcats, kangaroo rats, and burrowing owls responding to the lure of the dry, cool air. You'll witness some of the most fascinating geologic displays to be found in any of Southern California's desertland: twisted rock formations and granite monoliths painted with faded colors into a giant and beautiful mosaic. These rocks are an immense attraction to rock climbers.