Stony Brook, also known as Stoney Brook, is a tributary of the Millstone River in Hunterdon and Mercer counties, New Jersey, in the United States. Course Stony Brook starts at , just south of Ringoes. It flows south through the Amwell Lake Wildlife Management Area. It flows southeast, flowing parallel to Route 31 while it receives Peters Brook and Woodsville Brook. It receives a tributary from Sourland Mountain, and crosses Pennington-Hopewell Road. It flows through the Hopewell Valley Country Club and the Stony Brook–Millstone Watershed Association's nature reserve, and then receives the Stony Brook Branch. From there, it flows between Bristol-Myers Squibb and the Baldwin State Wildlife Management Area, receiving Baldwins Creek. It then flows through Kunkel Park and receives Lewis Brook. It then turns east, flowing through Old Mill Road County Park and Rosedale Park, where it receives Honey Branch. It then flows through a mountainous area with several large meanders, and turns south near Coventry Farm Park. It flows through Princeton Open Space Acquisition and then crosses Route 206. It then flows parallel to Quaker Road (CR-533) until it reaches the Delaware and Raritan Canal, where it turns northeast. It then receives Duck Pond Run from under the canal, crosses Alexander Street, and drains into the Millstone River at , just east of Princeton. Tributaries Baldwins Creek Duck Pond Run Honey Branch Lewis Brook Peters Brook Stony Brook Branch Woodsville Brook Sister tributaries Beden Brook Bear Brook Cranbury Brook Devils Brook Shallow Brook Harrys Brook Heathcote Brook Indian Run Brook Little Bear Brook Millstone Brook Peace Brook Rocky Brook Royce Brook Simonson Brook Six Mile Run Ten Mile Run Van Horn Brook See also List of rivers of New Jersey References External links U.S. Geological Survey: NJ stream gaging stations USGS Coordinates in Google Maps Rivers of Mercer County, New Jersey Rivers of Hunterdon County, New Jersey Tributaries of the Raritan River Rivers of New Jersey