| Muddy Run | |
| Name Other: | Tributary to Georges Creek |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Muddy Run mouth |
| Pushpin Map Alt: | Map of Muddy 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: | Fairchance |
| Length: | 4.46miles[1] |
| Discharge1 Location: | Georges Creek |
| Discharge1 Avg: | 8.89cuft/s at mouth with Georges Creek[2] |
| Source1: | Redstone Creek divide |
| Source1 Location: | about 0.25 miles east of Oliphant Furnace, Pennsylvania[3] |
| Source1 Coordinates: | 39.8411°N -79.7131°W[4] |
| Source1 Elevation: | 1320feet |
| Mouth: | Georges Creek |
| Mouth Location: | Fairchance, Pennsylvania[5] |
| Mouth Coordinates: | 39.8133°N -79.7639°W |
| Mouth Elevation: | 1002feet |
| Progression: | west and south |
| River System: | Monongahela River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Mountain Road, Oliphant Road, Post Office Road, Willey Road, Old Wynne Road, Georges Fairchance Road, Wynn Road, W Church Street |
Muddy Run is a 4.46miles long 2nd order tributary to Georges Creek in Fayette County, Pennsylvania.
Muddy Run rises about 0.25 miles east of Oliphant Furnace, Pennsylvania,[3] and then flows west and south to join Georges Creek at Fairchance, Pennsylvania.[5]
Muddy Run drains of area, receives about 44.2 in/year of precipitation, has a wetness index of 410.02, and is about 36% forested.[2]