Cly Butte is a summit on Navajo Nation land in Arizona within the Monument Valley landscape, where isolated buttes and mesas rise sharply above the desert floor. It is especially striking for how abruptly it climbs about 600 feet above the surrounding terrain. Runoff from its slopes drains into Gypsum Creek, a tributary of the San Juan River. Its name honors a Navajo chief named Cly, who is buried at its base. The butte is formed from Organ Rock Shale below and De Chelly Sandstone above, a contrast that helps create Monument Valley’s distinctive landforms through differing rates of erosion in this semi-arid high desert.