Ammonoosuc River
 The Ammonoosuc River is a river 55 mi (89 km) long in northwestern New Hampshire in the United States. It is a tributary of the Connecticut River which flows to Long Island Sound. Ammonoosuc is Abnaki for small narrow fishing place. The Ammonoosuc rises on the western slope of Mount Washington in Sargent's Purchase in the White Mountains of southern Coos County. One branch of the river is the outlet of the Lakes of the Clouds in the saddle between Mount Washington and Mount Monroe.