The Ausable River (/ɔːˈseɪbəl/), also known as AuSable River and originally written as "Au Sable", runs in the U.S. state of New York, from the Adirondack Mountains and past the village of Lake Placid and Au Sable Forks to empty into Lake Champlain (at 44°33′40″N 73°25′25″W / 44.56111°N 73.42361°W / 44.56111; -73.42361).
It has an East and West branch that join at Au Sable Forks.
[1] It was originally named "Au Sable" (French for "sandy") by Samuel de Champlain when he first explored the region in 1609 because of its extensive sandy delta.
[1] The West Branch of the Ausable arises from the confluence of the MacIntyre, South Meadow and Marcy Brooks, east of Mount Jo near the Adirondak Loj; it then runs 36 miles (58 km) northeast to Au Sable Forks (44°26′25″N 73°40′28″W / 44.44028°N 73.67444°W / 44.44028; -73.67444), and is fed by Lake Placid and the Chubb River along the way.
At high water-levels, the upper end provides demanding white-water paddling opportunities.