Tenmile Run (Susquehanna River tributary)

Tenmile Run
Tenmile Run in its lower reaches looking upstream
Etymologynamed for its location near a ten-mile post in a road
Physical characteristics
Source 
  locationMifflin Township, Columbia County, Pennsylvania
Mouth 
  location
Susquehanna River in Mifflin Township, Columbia County, Pennsylvania
  elevation
463 ft (141 m)
Length6.1 mi (9.8 km)
Basin size8.24 sq mi (21.3 km2)

Tenmile Run (also known as Ten Mile Run or Ten-mile Run) is a tributary of the Susquehanna River in eastern Columbia County, Pennsylvania, in the United States. It is 6.1 miles (9.8 km) long and is entirely in Mifflin Township. The stream's watershed has an area of 8.24 square miles. The first settlers in the area arrived in the late 1700s and a number of mills have been built on the stream. It is designated as a High-Quality Coldwater Fishery and as Class A Wild Trout Waters.