McDonald Tanks Number One and Number Two is a reservoir located in Greenlee County, Arizona. It appears on the Harden Cienega USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 5,135.56 feet (1,565.32 m) above sea level. The nearest populated place is Harden Cienega, approximately 3.0 miles to the ESE.