Backbone Tank is a reservoir located in El Paso County, Texas. It appears on the Clint NE USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 4,067.36 feet (1,239.73 m) above sea level. The nearest populated place is Cattleman's North Ranchos Number 3 Colonia, approximately 3.7 miles to the S.