| Navy Run | |
| Name Other: | Tributary to Muddy Creek |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Navy Run mouth |
| Pushpin Map Alt: | Map of Navy Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Crawford |
| Length: | 4.59miles[1] |
| Discharge1 Location: | Muddy Creek |
| Discharge1 Avg: | 7.11cuft/s at mouth with Muddy Creek[2] |
| Source1: | Sugar Creek divide |
| Source1 Location: | about 0.25 miles southwest of Steuben Corners, Pennsylvania |
| Source1 Coordinates: | 41.6728°N -79.8406°W[3] |
| Source1 Elevation: | 1600feet[4] |
| Mouth: | Muddy Creek |
| Mouth Location: | about 2 miles southeast of Little Cooley, Pennsylvania |
| Mouth Coordinates: | 41.7225°N -79.8711°W |
| Mouth Elevation: | 1210feet[5] |
| Progression: | north and northwest |
| River System: | Allegheny River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Tryonville Road, Armstrong Road, Drake Hill Road |
Navy Run is a 4.59miles long 1st order tributary to Muddy Creek in Crawford County, Pennsylvania. This is the only stream of this name in the United States.[3]
Navy Run rises about 0.25 miles southwest of Steuben Corners, Pennsylvania, and then flows north and northwest to join Muddy Creek about 2 miles southeast of Little Cooley, Pennsylvania.[5]
Navy Run drains of area, receives about 45.2 in/year of precipitation, has a wetness index of 446.28, and is about 41% forested.[2]