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Skull Rock Trail is in Joshua Tree National Park which is located in southeastern California.

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. Below is a picture of a joshua tree.