AssetID: 129312747 / Chris Hackett / USA, New York State, Adirondack Mountains, Lake Placid The Adirondack Mountains are a mountain range located in the northeastern part of New York , that runs through Clinton , Essex , Franklin , Fulton , Hamilton , Herkimer , Lewis , Saint Lawrence , Saratoga , Warren , and Washington counties. The mountains are often included by geographers in the Appalachian Mountains , but they bear a greater geological similarity to the Laurentian Mountains of Canada . They are bordered on the east by Lake Champlain and Lake George , which separate them from the Green Mountains in Vermont . They are bordered to the south by the Mohawk Valley , and to the west by the Tug Hill Plateau , separated by the Black River . This region is south of the Saint Lawrence River . Description above from the Wikipedia article Adirondack Mountains, licensed under CC-BY-SA full list of contributors here. This page is not affiliated with, or endorsed by, anyone associated with the topic.