| Foster Brook | |
| Name Other: | Tributary to Tunungwant Creek |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Map Caption: | Location of Foster Brook mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | McKean |
| Length: | 4.88miles[1] |
| Discharge1 Location: | Tunungwant Creek |
| Discharge1 Avg: | 2.37cuft/s at mouth with Tunungwant Creek[2] |
| Source1: | Baker Run divide |
| Source1 Location: | about 1.5 miles southeast of Gilmore, Pennsylvania |
| Source1 Coordinates: | 41.9595°N -78.5364°W[3] |
| Source1 Elevation: | 1950feet |
| Mouth: | Tunungwant Creek |
| Mouth Location: | Foster Brook, Pennsylvania |
| Mouth Coordinates: | 41.9837°N -78.6253°W |
| Mouth Elevation: | 1404feet |
| Progression: | Tunungwant Creek → Allegheny River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Allegheny River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | Pennbrook Run Harrisburg Run |
| Bridges: | Derrick Road, PA 646, PA 346 (x2), Babcock Road, Fairview Heights, E Main Street, Bradford Mall, US 219 |
Foster Brook is a 4.88miles long third-order tributary to Tunungwant Creek.[1]
Foster Brook rises about southeast of Gilmore and then flows northwest to meet Tunungwant Creek at Foster Brook, Pennsylvania.
Foster Brook drains of area, receives about of precipitation, and is about 87.64% forested.[2]