Stating the U.S. Joshua Tree National Park southeastern California. Named for Joshua trees (Yucca brevifolia) native to the Park. It covers an area of 790.636 acres (1, 235.37 SQ mi; 3, 199.59 km2) — an area slightly larger than the State of Rhode Island. Most of the garden, some 429.690 acres (173.890 ha), is a designated wilderness area. Straddling the border of San Bernardino County, Riverside County, the Park includes parts of two deserts, each ecosystem characteristics are determined primarily by elevation: Mojave Desert higher and lower Colorado desert. Little San Bernardino Mountains running through the southwestern edge of the park.
Rock formations were established more than 100 million years ago, with roughly rectangular joints from cooling magma beneath the surface to monzogranite. Ground water is then filtered through joints is to scrape the corners and edges to create the rounded stones, and flash floods washed away soil cover to create a pile of stones. This prominent outcrop is known as inselbergs.
There are several hiking trails within the Park, many of which can be accessed from a campground. Shorter lines, such as the one-mile hike through Hidden Valley, offers the opportunity to see the beauty of the park without straying too far into the wilderness. Part of the California riding and Hiking Trail meanders for 35 miles (56 km) through the West side of the Park. Lookout point at keys View, towards the South of the Park, offers views of the Coachella Valley and the Salton Sea.
A paved road allows visitors to drive to and through the main attractions of the Park. Visitors by four-wheel drive vehicles can use the road for a tour with stops that describes the geology of the region.