Spruce Run (Buffalo Creek tributary)

Spruce Run
Spruce Run looking upstream
Physical characteristics
Source 
  locationnarrow valley in eastern Hartley Township, Union County, Pennsylvania
  elevationbetween 1,760 and 1,780 feet (536 and 543 m)
Mouth 
  location
Buffalo Creek on the border between Buffalo Township, Union County, Pennsylvania and Kelly Township, Union County, Pennsylvania
  coordinates
40°58′38″N 76°58′43″W / 40.97715°N 76.97849°W / 40.97715; -76.97849
  elevation
482 ft (147 m)
Length14 mi (23 km)
Basin size27.2 sq mi (70 km2)
Basin features
ProgressionBuffalo Creek → West Branch Susquehanna RiverSusquehanna RiverChesapeake Bay
Tributaries 
  rightBlack Run, Muddy Run

Spruce Run is a tributary of Buffalo Creek in Union County, Pennsylvania, in the United States. It is approximately 14 miles (23 km) long and flows through Hartley Township, Lewis Township, West Buffalo Township, White Deer Township, Buffalo Township, and Kelly Township. The watershed of the stream has an area of 27.2 square miles (70 km2). The stream has two named tributaries: Black Run and Muddy Run. It is not designated as an impaired waterbody, but it is affected by sediment and nutrients.

Spruce Run mainly flows through mountainous terrain and the Spruce Run Reservoir is in its watershed. The watershed of its main stem is mostly forested. There used to be a mill near the stream's mouth and lumbering was done in the surrounding area. A number of bridges have been constructed across it. Part of the stream is designated as Exceptional Value waters and a Migratory Fishery, while the other part is a High-Quality Coldwater Fishery and a Migratory Fishery. The stream has been described as an "excellent" site for angling.