Gillespie Run (Youghiogheny River tributary)
# Gillespie Run (Youghiogheny River tributary)

Gillespie Run is a 4.11 mi (6.61 km) long 3rd order tributary to the Youghiogheny River in Allegheny County, Pennsylvania.

## Course

Gillespie Run rises about 2 miles west-southwest of Mustard, Pennsylvania, and then flows northeasterly to join the Youghiogheny River across from Sutersville.

## Watershed

Gillespie Run drains 8.32 square miles (21.5 $km^2)$ of area, receives about 39.5 in/year of precipitation, has a wetness index of 318.16, and is about 62% forested.

