Which mountains are between Lake Champlain and the St Lawrence, in the state of New York, USA?

Answer 1

Adirondack Mountains
The Adirondack Mountains form a massif in northeastern New York, United States. Its boundaries correspond to the boundaries of Adirondack Park. The mountains form a roughly circular dome, about 160 miles in diameter and about 1 mile high. The current relief owes much to glaciation.