RATTLESNAKE BUTTE. Rattlesnake Butte is just south of U.S. Highway 385 and the tracks of the Atchison, Topeka and Santa Fe Railway ten miles east of McCamey in south central Upton County (at 31°09' N, 102°04' W). Its summit has an elevation of 2,702 feet. Rattlesnake Butte is composed of limestone and a calcareous clay substrate with shallow, stony, clay loams. Juniper, oak, grasses, chaparral, and cacti are found on its slopes.