Long Creek (Back Creek tributary)  Long Creek is a long 2nd order tributary to Back Creek in Cecil County, Maryland. According to the Geographic Names Information System, it has also been known historically as:   Long Creek rises on the Belltown Run divide at Marabou Meadows in New Castle County, Delaware. Long Creek then flows southwest into Maryland to meet Back Creek at Dans, Maryland. Long Creek drains of area, receives about 45.4 in/year of precipitation, has a topographic wetness index of 558.56 and is about 18.3% forested.