|This article does not cite any references or sources. (April 2010)|
The Kisco River is a creek that runs through the Mount Kisco, New York area. It is formed by the forks of Chappaqua Brook and an unnamed stream. It follows a 3.3-mile (5.3 km) winding course before emptying into the New Croton Reservoir at Lake Road Bridge in the town of New Castle near the hamlet of Stanwood and eventually into the Atlantic Ocean via the Croton River, the Hudson River, and New York Harbor.
Its name is derived from the Village of Mount Kisco, which the river flows through. The name of Mount Kisco is further derived from "seesquee", which may also be written as "cisqua", which is the Algonquin word for "muddy place", referring to the marshlands in the area.
The Kisco River begins at the confluence of an unnamed brook and Chappaqua Brook immediately north of the New Castle/Mount Kisco sewage treatment plant and the Saw Mill River Parkway. It runs through the woods within feet of suburban development and forms the border between the towns of New Castle and Mount Kisco, New York. It runs underneath Route 133 after a stream runs into it. It then runs through "Riverwoods", a town house complex. It continues past the Bedford Yeshiva Farm Settlement, a small yeshiva. The Riverwoods wastewater treatment plant discharges its wastewater into the river at this point. It then passes underneath Croton Lake Road and empties into the Muscoot Reservoir at its widest point of 1,100 feet (340 m).
Several storm drains empty into the river along its course. It runs through a primarily developed wetland area.