| Pollock Run | |
| Name Other: | Tributary to Youghiogheny River |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Pollock Run mouth |
| Pushpin Map Alt: | Map of Pollock Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Westmoreland Allegheny |
| Length: | 5.55miles[1] |
| Discharge1 Location: | Youghiogheny River |
| Discharge1 Avg: | 9.16cuft/s at mouth with Youghiogheny River[2] |
| Source1: | Cedar Creek divide |
| Source1 Location: | Rankins Corners, Pennsylvania[3] |
| Source1 Coordinates: | 40.1692°N -79.82°W[4] |
| Source1 Elevation: | 1060feet |
| Mouth: | Youghiogheny River |
| Mouth Location: | Smithdale, Pennsylvania[5] |
| Mouth Coordinates: | 40.2278°N -79.7886°W |
| Mouth Elevation: | 739feet |
| Progression: | Youghiogheny River → Monongahela River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Monongahela River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Fallsburg Road, PA 51, PA 201, Moores Road, PA 136, Coal Hollow Road (x3), Margaret Street (x2) |
Pollock Run is a 5.55miles long 2nd order tributary to the Youghiogheny River in Allegheny County, Pennsylvania. This is the only stream of this name in the United States.[4]
Pollock Run rises at Rankins Corners, Pennsylvania in Westmoreland County,[3] and then flows southeast and then turns north to join the Youghiogheny River just into Allegheny County at Smithdale.[5]
Pollock Run drains of area, receives about 39.7 in/year of precipitation, has a wetness index of 335.80, and is about 40% forested.[2]
Pollock Run is the location of Pollock Run Slopes BDA, which contains a remnant Mesic Central Forest community and a rare plant species.[6]