The Mount Wilson Wilderness (23,900 acres) in Arizona, is managed by the Bureau of Land Management. In 1990, the Mount Wilson Wilderness became part of the now over 109 million acre National Wilderness Preservation System established by the Wilderness Act of 1964. In wilderness, you can enjoy challenging recreational activities and extraordinary opportunities for solitude. Please follow the regulations in place for this area, and use Leave No Trace techniques when visiting to ensure protection of its unique natural and experiential qualities. How to follow the seven standard Leave No Trace principles differs in different parts of the country (desert vs. Rocky Mountains). Click on any of the principles listed below to learn more about how they apply. Motorized equipment and equipment used for mechanical transport are generally prohibited on all federal lands designated as wilderness. This includes the use of motor vehicles (including OHVs), motorboats, bicycles, hang gliders, wagons, carts, portage wheels, and the landing of aircraft including helicopters Contact the agency for more information about regulations. Water is scarce in this part of the Black Mountains. It can usually be found at Missouri Spring and at Wildhorse Spring, located northeast of Mount Wilson. Ephemeral water can sometimes be found in rain pockets following storms. The terrain in Mount Wilson Wilderness is extremely rugged. No trails, other than old vehicle ways described above, are present, although sometimes burro and sheep trails can be located and followed. Daytime temperatures during the summer months often exceed 100 degrees. Temperatures are more moderate between October 1 and April 30. Most of the lands surrounding the wilderness are administered by the Lake Mead National Recreation Area. Obey all National Park Service public use and off-road-vehicle restrictions when accessing the Mount Wilson wilderness.