Headwaters of the Connetquot River
|- location||Lakeland County Park,|
Islandia, New York
|- elevation||50 feet (15 m)|
|Nicholls Bay on the Great South Bay|
|0 ft (0 m)|
|Length||6 mi (10 km)|
|Basin size||4,500 acres (7 sq mi)|
The Connetquot River (also known as Great River) is a six-mile-long (10 km) river in Islip, New York. It is one of the four longest rivers on Long Island and is recognized by the state as a Wild, Scenic and Recreational River. It is particularly known for its brook, brown and rainbow trout fly fishing.
The upper reaches of the river including its headwaters are totally in the Connetquot River State Park Preserve or Lakeland County Park before it becomes an estuary. It starts just south of the Long Island Expressway from springs in the Lakeland County Park in Islandia where it is called Connetquot Brook. The estuary portion south of Sunrise Highway at Oakdale is officially called the Connetquot River although in popular usage both the brook and river share the same name.
The entire Connetquot River watershed habitat represents the largest undeveloped contiguous area within Suffolk County that covers an entire river watershed. The river is generated entirely from groundwater springs, and like all other rivers on Long Island, does not arise from a lake.
List of crossings of the Connectquot River
- Long Island Expressway Eastbound Service Road
- Johnson Avenue
- Long Island Rail Road Main Line
- Perimeter Road
- New York State Route 454
- Bunces Bridge (Long Island Greenbelt Trail)
- Red Trail (North)
- Red Trail (Fish Hatchery)
- Red and Blue Trail
- New York State Route 27 and Montauk Highway (Suffolk CR 85)
- Long Island Rail Road Montauk Branch and Biltmore Avenue
- "Connetquot River". Geographic Names Information System. United States Geological Survey. Retrieved April 17, 2016.
- Schultz, Ken (February 13, 2006). "Connetquot River So Good, So Close to Many". ESPN.com. Retrieved April 18, 2016.
- "Connetquot River Coastal Fish & Wildlife Habitat Assessment Form" (PDF). New York State Department of State. December 15, 2008. Retrieved April 18, 2016.
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