Elk Run (West Branch Fishing Creek tributary)

Elk Run
Elk Run looking upstream in Elk Grove
Physical characteristics
Source 
  locationnorthern edge of North Mountain in northern Davidson Township, Sullivan County, Pennsylvania
  elevationbetween 2,240 and 2,280 feet (680 and 690 m)
Mouth 
  location
West Branch Fishing Creek in Davidson Township, Sullivan County, Pennsylvania
  coordinates
41°18′20″N 76°24′23″W / 41.3055°N 76.4064°W / 41.3055; -76.4064
  elevation
1,171 ft (357 m)
Length4.8 mi (7.7 km)
Basin size7.49 sq mi (19.4 km2)
Basin features
ProgressionWest Branch Fishing Creek → Fishing CreekSusquehanna RiverChesapeake Bay
Tributaries 
  leftGallows Run
  rightHog Run, Long Run

Elk Run is a tributary of West Branch Fishing Creek in Sullivan County and Columbia County, in Pennsylvania. It is approximately 4.8 miles (7.7 km) long and flows through Davidson Township in Sullivan County and Sugarloaf Township in Columbia County. The watershed of the stream has an area of 7.49 square miles (19.4 km2). The stream has three named tributaries: Gallows Run, Hog Run, and Long Run. Elk Run is considered to be an Exceptional Value stream and a Migratory Fishery. The forests surrounding it are deemed by the Sullivan County Natural Areas Inventory to be a "locally significant" area. The stream is named for an elk that was killed in it in the 1840s.

Elk Run is considered to be impaired by atmospheric deposition for a portion of its length. Glacial activity occurred near the stream during the Wisconsinan Glaciation. Wisconsinan Ice-Contract Stratified Drift, Wisconsinan Bouldery Till, Wisconsinan Till, and alluvium can be found near the stream. A bridge was constructed over it in 2000.