HOUSETOP MOUNTAIN. Housetop Mountain is a half mile west of the Brewster county line in east central Presidio County (at 29°59' N, 103°51' W). Its summit, at an elevation of 5,337 feet above sea level, rises 937 feet above Hackberry Draw, which runs along the eastern edge of the mountain. Housetop Mountain is formed of volcanic tuffs and is surrounded by wash deposits of sand and gravel. The topography of the area is desert mountain terrain and rugged canyonland with loose surface rubble. Area vegetation consists primarily of sparse grasses, cacti, and desert shrubs of conifers and oaks. Housetop Mountain was named for its shape.