Manzanares (river) Manzanares (river) The Manzanares () is a river in central Spain, which flows from the Sierra de Guadarrama, passes through Madrid, and eventually empties into the Jarama river, which in turn is a tributary to the Tagus. In its urban section, the Manzanares River as it appears today, with a section of water several meters deep, in some parts navigable by canoes, is the result and the product of the work of dozens of years of channeling and damming. The river Manzanares has its source near the Navacerrada mountain pass in the Guadarrama mountain range. The upper river basin is
University City, Missouri at the tri-border of University City, Ladue, and Olivette. The city also contains part of Midland Boulevard, which divides the watersheds of the Mississippi River and the Missouri River. The River Des Peres rises in the hills near the University City and Clayton boundary, flows north, takes a strong turn at Ruth Park, and then runs through culverts southeast through the city of St. Louis to debouche in the Mississippi River. Major roads and highways in University City are Interstate 170 (I-170), Missouri Route 340 (MO-340), Delmar Boulevard, Forest Park Parkway, Olive Boulevard and Skinker Parkway. The city has long