The county seat of Suffolk County, NY lies at the mouth of a river that flows into which body of water?
Peconic River The Peconic River is a river within Suffolk County on Long Island, New York in the United States. The river is located in the eastern end of Long Island. The Peconic River drains an area between the Harbor Hill and Ronkonkoma terminal moraines, and flows into Flanders Bay which in turn connects to Peconic Bay east of Riverhead.
Fishkill Creek Fishkill Creek is a tributary of the Hudson River in Dutchess County, New York, United States. At 33.5 mi it is the second longest stream in the county, after Wappinger Creek. It rises in the town of Union Vale and flows generally southwest to a small estuary on the Hudson just south of Beacon. Part of its 193 sqmi watershed is in Putnam County to the south. Sprout Creek, the county's third-longest creek, is its most significant tributary. Whaley and Sylvan lakes and Beacon Reservoir, its largest, deepest and highest lakes, are among the bodies of water within the watershed.