Rattlesnake Pasture Tank is a reservoir located in Greenlee County, Arizona. It appears on the Rattlesnake Spring USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 6,089.01 feet (1,855.93 m) above sea level. The nearest populated place is Harden Cienega, approximately 8.5 miles to the NE.