Grasse River

Grass River Grasse River
Location
Country	United States
State	New York
Physical characteristics
Source	Middle Branch Grass River, South Branch Grass River
Mouth	St. Lawrence River
• location	Massena, New York
• coordinates	44°59′12″N 74°46′14″W / 44.9868°N 74.7706°W / 44.9868; -74.7706
• elevation	171 ft (52 m)
Length	73 mi (117 km)
Basin size	619 sq mi (1,600 km2)
Basin features
Tributaries
• left	Black Brook, Plumb Brook, Gibbons Brook, Harrison Creek, Line Creek, Massena Power Canal
• right	North Branch Grass River, Pleasant Creek, Edmond Brook, Little River, Nettle Creek, McConnell Creek
Waterfalls	Lampsons Falls

The Grasse River or Grass River (per 1905 decision of the U.S. Board on Geographic Names) is a 73-mile-long (117 km)^[1] river in northern New York, in the United States. The river mainly flows northeast from the foothills of the Adirondack Mountains into the St. Lawrence Valley, making up what is known as the greater St. Lawrence River Drainage Basin along with other tributaries such as the Oswegatchie and Raquette rivers.

The river was named after François Joseph Paul, comte de Grasse,^{[citation needed]} a French admiral and hero of the American Revolutionary War. He defeated British forces in the Battle of the Chesapeake, contributing to their surrender at Yorktown, ending the war.