page_title: Black River (New York)
section_title: Course
hierarchical_section_title: Black River (New York) / Course
caption_attribution_description: English: A small tributary cascade waterfall on the Black River, just south of New York Rte 3 near a canoe launch point on the Black River Trail
context_page_description: The Black River is a 125-mile-long blackwater river that empties into the eastern end of Lake Ontario on the shore of Jefferson County, New York in the United States. The origin of the name is not clear, but it may stem from the natural tannic acid that darkens the water in places. The river flows in a generally northwest direction, with its valley dividing the Adirondack Mountains on the east from the Tug Hill region to the west.
context_section_description: The Black River originates at North Lake in the foothills of the Adirondacks, in Herkimer County, about 25 miles (40 km) east of Boonville. The river flows west into Oneida County then north, past Forestport and Boonville into Lewis County. At Lyons Falls, it is joined by the Moose River from the east just above the eponymous waterfall, where the river drops 70 feet (21 m) over a gneiss cliff.
  Near Glenfield the Black River receives the smaller tributaries of Otter Creek and the Independence River, also from the east. Further north, it passes Lowville, then receives the Beaver River from the east, then the Deer River, its only major western tributary. Starting above Carthage the river briefly divides Lewis and Jefferson Counties before crossing entirely into Jefferson County, where it turns sharply west toward Lake Ontario, flowing past Great Bend, Black River and Watertown. Below Watertown it enters a canyon, well known for its challenging rapids.
   
  The river ends at Lake Ontario in the village of Dexter, about 10 miles (16 km) west of Watertown, where it empties into the Black River Bay and Marsh, which are parts of the Golden Crescent. For the last few miles it forms the boundary between the Towns of Brownville and Hounsfield.
caption: The cascade of a small tributary entering the Black River just south of NY Route 3, in the Village of Black River.
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