Milliron Reservoir Number 2 is a reservoir located in Dawson County, Montana. It appears on the Cluster Buttes NW USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 2,316.37 feet (706.03 m) above sea level. The nearest populated place is Lufboro (historical), approximately 9.5 miles to the NNW.