| Pennbrook Run | |
| Name Other: | Tributary to Foster Brook |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Map Caption: | Location of Pennbrook Run mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania New York |
| Subdivision Type3: | County |
| Subdivision Name3: | McKean |
| Length: | 2.91miles[1] |
| Discharge1 Location: | Foster Brook |
| Discharge1 Avg: | 6.49cuft/s at mouth with Foster Brook[2] |
| Source1: | Chipmunk Creek divide |
| Source1 Location: | about 0.5 miles southwest of Nichols Run, New York |
| Source1 Coordinates: | 41.9994°N -78.5231°W[3] |
| Source1 Elevation: | 2170feet |
| Mouth: | Foster Brook |
| Mouth Location: | Gilmore, Pennsylvania |
| Mouth Coordinates: | 41.972°N -78.5664°W |
| Mouth Elevation: | 1591feet |
| Progression: | Foster Brook → Tunungwant Creek → Allegheny River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Allegheny River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Bells Camp Road (x3), PA 646 (x3) |
Pennbrook Run is a 2.91miles long second-order tributary to Foster Brook.[1] This is the only stream of this name in the United States.[3]
According to the Geographic Names Information System, it has also been known historically as:[3]
Pennbrook Run rises about 0.5 miles southwest of Nichols Run, New York and then flows southwest to meet Foster Brook at Gilmore, Pennsylvania.
Pennbrook Run drains of area, receives about of precipitation, and is about 93.93% forested.[2]