Lake Champlain
The tweed
The 49th parallel of latitude forms the border between Canada and the US from Lake of the Woods to the Georgia Strait. The 45th parallel of latitude also forms part of the border between Canada and the US along the northern boundaries of the states of New York, Vermont and New Hampshire.
The Rio Grande forms part of the US border with Mexico, while the St. Lawrence River forms part of the border between the US and Canada.
The 49th parallel
Great Lakes
The Rocky Mountains form the border between Alberta and British Columbia in Canada.
45 dagrees north
lake erie
New york
The Saint Lawrence forms part of the eastern border between the United States and Canada. Other rivers that form the border include Rainy River, Pigeon River, and Niagara River.
It is the Canda-United States border, but is officially known as the International Border.
Canada forms the most northerly border of the U.S.