Hirsig Enlargement R P Allen Number 1 Reservoir is a reservoir located in Laramie County, Wyoming. It appears on the Hirsig Ranch USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 6,352.21 feet (1,936.15 m) above sea level. The nearest populated place is Lambert, approximately 4.9 miles to the NW.