The St. Lawrence River of the Canadian provinces of Ontario and Quebec forms part of the international boundary line between Ontario and New York State.
The Niagara River separates Canada & the U.S., from Buffalo to Niagara falls.
There are several rivers that separate Canada and the US. Some are:
The Yukon River is a major river in North America. It flows through British Columbia, Canada and Alaska.
The Yukon River crosses the Canada-US border, but does not form part of it.
The following are some of the rivers that are in both Canada and the US: Columbia River, Kootenay River, Milk River, Souris River, Red River, Richelieu River. They all cross the Canada/US border at least once, and a few of them do so twice.
The Niagara River, which flows north connecting Lake Erie to Lake Ontario, between the province of Ontario and the state of New York. At Niagara Falls, parts of the falls are entirely within the US, and the remainder border Canada.
Michigan river =========== No part of the Canada-US border is called the "Michigan River." Rivers forming part of the Canada-US border include: Rainy River, Pigeon River, St Marys River, St Clair River, Detroit River, Niagara River, St Lawrence River, St John River, St Croix River.
If this is for the study island question which states "Suppose that there's a river which begins in Canada and flows through the United States before finally reaching the ocean. Which of the following activities by Canada would most likely cause problems for the United States?" then the answer is "constructing a dam to generate electricity."
The Yukon River.
Erie
the Mississippi river
The river that flows through Texas into the Mississippi is the Red River. It is a tributary of the Mississippi River.
There are two different Colorado River systems in the US. The Colorado River (Texas) flows through Austin.
snake river.
The Clearwater River does
snake river.
This is the St. Lawrence River, which flows from Lake Ontario to the Gulf of St. Lawrence, and the Atlantic Ocean. It only actually separates the province of Ontario from the state of New York, and then flows through Quebec.
Mississippi River
Mississippi River
Mexico