The Watchman

Monument Valley is located on the southern border of Utah with northern Arizona (around 36°59′N, 110°6′W). The valley lies within the range of the Navajo Nation Reservation, and is accessible from U.S. Highway 163. The Navajo name for the valley is Tsé Bii’ Ndzisgaii (Valley of the Rocks).
The area is part of the Colorado Plateau. The floor is largely Cutler Red siltstone or its sand deposited by the meandering rivers that carved the valley. The valley’s vivid red color comes from iron oxide exposed in the weathered siltstone. The darker, blue-gray rocks in the valley get their color from manganese oxide.
Monument Valley has been featured in many forms of media since the 1930s. Appearances include movies, such as Westerns by Director John Ford, and science fiction movies such as Back to the Future III; television appearances as in MacGyver; as well as DVD covers, book covers, and video games such as the Playstation 3 video game Motorstorm.