The Milwaukee River is a river in the state of Wisconsin. It is about 104 miles long. Once a locus of industry, the river is now the center of a housing boom. New condos now crowd the downtown and harbor districts of Milwaukee attracting young professionals to the area. The river is also ribboned with parks as it winds through various neighborhoods. Kaya…The Milwaukee River is a river in the state of Wisconsin. It is about 104 miles long. Once a locus of industry, the river is now the center of a housing boom. New condos now crowd the downtown and harbor districts of Milwaukee attracting young professionals to the area. The river is also ribboned with parks as it winds through various neighborhoods. Kayaks and fishing boats share the river with party boats. An extensive Riverwalk featuring art displays, boat launches and restaurants lines its banks in downtown Milwaukee.