| Beaver Run | |
| Name Other: | Tributary to Neshannock Creek |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Beaver Run mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States of America |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Mercer |
| Subdivision Type4: | Township |
| Subdivision Name4: | East Lackawannock |
| Length: | 2.78miles[1] |
| Discharge1 Avg: | 5.62cuft/s at mouth with Neshannock Creek[2] |
| Source1: | divide between Beaver Run and Shenango River (Lackawannock Creek) |
| Source1 Location: | about 1.5 miles southwest of Mercer, Pennsylvania |
| Source1 Coordinates: | 41.2103°N -80.2767°W[3] |
| Source1 Elevation: | 1220feet[4] |
| Mouth: | Neshannock Creek |
| Mouth Location: | about 1 mile south of Mercer, Pennsylvania |
| Mouth Coordinates: | 41.2011°N -80.2319°W[5] |
| Mouth Elevation: | 1060feet[6] |
| Progression: | Neshannock Creek → Shenango River → Beaver River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Beaver River |
| Basin Size: | [7] |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
Pine Run is a tributary to Neshannock Creek in western Pennsylvania. The stream rises in south-central Mercer County and flows southeast entering Neshannock Creek south and downstream of Mercer, Pennsylvania. The watershed is roughly 46% agricultural, 45% forested and the rest is other uses.[8]