The Navesink River is an estuary, approximately 8 mi (12 km) long in Monmouth County, New Jersey, United States. It is surrounded by the communities of Middletown, Red Bank, Fair Haven and Rumson.
Known officially as the North Shrewsbury River and upstream of Red Bank as the Swimming River, it is formed southwest of Red Bank by the confluence of the Swimming River with several smaller streams. It extends ENE along the north side of Red Bank, connecting to the Shrewsbury River estuary at Rumson, approximately 1 mi (1.6 km) south of the entrance of the Shrewsbury River into Sandy Hook Bay near Highlands.
The area was originally populated by the Lenni Lenape Indians. In 1665, John Hance was one of the settlers who negotiated with the Navesink Indians of the Lenni Lenape Tribe to purchase the lands of this peninsula and the immediate surroundings through the Monmouth Patent. Following the founding of Red Bank in 1736 (named after its situation on the "red banks" of the Navesink River), the river was important for transportation from the Navesink River communities to New York City and was served by side-wheeler steamboats until the 1950s.
Today the river is a major recreational resource for powerboating, crabbing, fishing, sailing, canoeing, kayaking, bird watching, swimming and rowing. During particularly cold winters, the Navesink can freeze, adding ice skating and ice boating to the list of recreations available. The area along the Navesink banks is one of the most affluent in New Jersey. Today, the town of Red Bank rests situated on its banks, with hotels and apartment buildings that offer scenic views of the river. Select homes in Red Bank, Fair Haven, and Rumson share similar views.
As a tidal estuary flowing into the Shrewbury River at Sea Bright, continuing into Sandy Hook Bay and ultimately the Atlantic Ocean, the Navesink provides excellent and scenic fishing opportunities for species such as bluefish (smaller bluefish are known as snappers), striped bass, weakfish and fluke, especially in the spring and fall. Crabbing is particularly popular in the upstream Swimming River section.