The Bronx River is a freshwater river located in the Bronx, New York City. It stretches approximately 23 miles, flowing from the northern part of the Bronx to the East River. The river is significant for its historical role in the development of the area and is the only freshwater river in New York City. The Bronx River is surrounded by parks and green spaces, including the Bronx River Greenway, which provides recreational opportunities for residents and visitors. Efforts have been made to restore the river's ecosystem, improving water quality and promoting wildlife habitats along its banks.