Upper Ammonoosuc River
The Upper Ammonoosuc River is a tributary of the Connecticut River that flows through Coös County in northern part of the northeastern U.S. state of New Hampshire. Despite its name, the river is not an upstream portion of the Ammonoosuc River, but instead a separate tributary of the Connecticut River flowing from to the north of the Ammonoosuc.
The Upper Ammonoosuc rises in Pond of Safety in the town of Randolph, runs first generally north through rural portions of Berlin, Milan and a corner of Dummer, then west through Stark and then Northumberland where it drains into the Connecticut near the village of Groveton. The end points of that course are approximately 25 air miles apart.
From Milan to Groveton it is fairly closely paralleled by New Hampshire Route 110.
Fort Wentworth was built in 1755 at the junction of the Upper Ammonoosuc and the Connecticut Rivers. The fort was used sporadically during both the French and Indian War and the American Revolutionary War.
The watershed area includes the northern Crescent Range, eastern Pliny Range and the eastern and northern Pilot Range, all in the White Mountains. Major tributaries of the Upper Ammonoosuc include:
