| Washington Run | |
| Name Other: | Tributary to Youghiogheny River |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Washington Run mouth |
| Pushpin Map Alt: | Map of Washington Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Fayette |
| Subdivision Type4: | Borough |
| Subdivision Name4: | Perryopolis |
| Length: | 5.16miles[1] |
| Discharge1 Location: | Youghiogheny River |
| Discharge1 Avg: | 10.28cuft/s at mouth with Youghiogheny River[2] |
| Source1: | Crabapple Run divide |
| Source1 Location: | about 1 mile west of Curfew, Pennsylvania[3] |
| Source1 Coordinates: | 40.0439°N -79.7783°W[4] |
| Source1 Elevation: | 1080feet |
| Mouth: | Youghiogheny River |
| Mouth Location: | across the Youighiogheny River from Layton, Pennsylvania[5] |
| Mouth Coordinates: | 40.0886°N -79.7289°W |
| Mouth Elevation: | 798feet |
| 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: | Fayette City Road, Tony Row Road, Quaker Church Road (x2), PA 51, Liberty Street, Cemetery Road, Layton Road (x2) |
Washington Run is a 5.16miles long 2nd order tributary to the Youghiogheny River in Fayette County, Pennsylvania.
Washington Run rises about 1 miles west of Curfew, Pennsylvania,[3] and then flows north and turns east to join the Youghiogheny River across from Layton.[5]
Washington Run drains of area, receives about 41.9 in/year of precipitation, has a wetness index of 353.54, and is about 51% forested.[2]