The Jones Falls is a 17.9-mile-long (28.8 km) stream in Maryland. It is impounded to create Lake Roland before running through the city of Baltimore and finally emptying into the Baltimore Inner Harbor.

A stream is a continuous body of surface water flowing within the bed and banks of a channel. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long, large streams are usually called rivers, while smaller, less voluminous and more intermittent streams are known as streamlets, brooks or creeks.