Klingermans Run begins on Catawissa Mountain in Roaring Creek Township. It flows east and very slightly north for more than a mile, entering Beaver Township before turning north-northeast for a few tenths of a mile. The stream then turns northeast for some distance before turning north. A few tenths of a mile downstream, it reaches its confluence with Catawissa Creek near Beaver Station Road. Klingermans Run joins Catawissa Creek upstream of its mouth.
Tributaries
Klingermans Run has no tributaries, named or unnamed.
Hydrology
The concentration of alkalinity in the waters of Klingermans Run is 1 milligram per liter. The pH of the stream is 6.0. The stream's water hardness is 2 milligrams per liter. At 12:55 P.M. on June 23, 1997, the air temperature in the vicinity of Klingermans Run was measured to be. The water temperature of the stream at that time was. The specific conductivity of the waters of the stream is 20 umhos.
Geography and geology
The elevation near the mouth of Klingermans Run is above sea level. The elevation at the source of the stream is approximately above sea level. The lower reaches of Klingermans Run are on rock of the Mauch Chunk Formation. The upper reaches of the stream are on rock of the Pocono Formation. The Leck Kill soil is found on the lower reaches of the stream. The rest of the stream is on Hazleton soil. Klingermans Run has a high gradient of 66.1 meters per kilometer. The stream is wide.
Watershed and history
The watershed of Klingermans Run has an area of. The watershed of the stream is mostly in Beaver Township, but a substantial portion is in Roaring Creek Township. Almost all of the watershed is in forested land, but a small portion is in agricultural land. The headwaters of the stream are in Pennsylvania State Game Lands Number 58, as is the rest of the upper half of the watershed. Klingermans Run is the nearest stream to Cranberry Run. The two streams have similar geology and land use. Klingermans Run is in the United States Geological Survey quadrangle for Shumans. 24 percent of the length of Klingermans Run is within of a road. 29 percent of the stream's length is within of a road and 43 percent is within of a road. In 1990, the population density of the watershed was 9 people per square kilometer. W. Klingerman, J. Klingerman, and I. Klingerman all historically owned property in the vicinity of Klingermans Run.
Biology
Klingermans Run is considered by the Pennsylvania Department of Environmental Protection to be a High-Quality Coldwater Fishery, but was considered to be a Coldwater Fishery as late as 1997. The stream is considered by the Pennsylvania Fish and Boat Commission to be Class A Wild Trout Waters between its headwaters and its mouth. It is inhabited by brook trout, but they are the only species of fish in the stream. These trout range between and in length. Their biomass is 33.90 kilograms per hectare. Trout also naturally reproduce in the stream. Klingermans Run was described as a poor site for angling in a 1997 report.