Brighams Tomb is a prominent summit in Monument Valley on Navajo Nation land in southeastern Utah, rising sharply from the desert floor and visible from Highway 163. Its dramatic relief comes from erosion that wore away softer rock at the base faster than the harder sandstone above, leaving an isolated landform typical of the valley. The mountain is made of layered formations ranging from the Permian to the Late Triassic and drains into the San Juan River basin. Named for Brigham Young, it was officially known as Saddleback from 1964 to 1987 before receiving its present official name in 1988.