Muddy Run may refer to: Muddy Run (Christina River tributary), a stream in New Castle County, Delaware Muddy Run (Georges Creek tributary), a stream in Fayette County, Pennsylvania Muddy Run (Conodoguinet Creek tributary), in Franklin County, Pennsylvania Muddy Run (Maurice River), a tributary of the Maurice River in New Jersey Muddy Run (West Branch Susquehanna River), in Northumberland County, Pennsylvania Muddy Run Pumped Storage Facility, a hydroelectric generation facility on the Susquehanna River in Pennsylvania Muddy Run (Spruce Run), in Union County, Pennsylvania
See also Muddy Creek (disambiguation) Muddy River (disambiguation) Muddy (disambiguation)