That river would be the mighty Columbia.
Roll on Columbia, roll on!
The United States of America lies along the south border of Canada (not counting Alaska which lies along the western border and Hawaii that doesn't border anything but the Pacific Ocean). Mexico and the rest of the countries of central and South America also lie south of Canada - just further south than the USA.
At some 15,985 miles or 25,725 kilometres, Canada's Pacific coastline is hardly short. If you mean why does Alaska's border extend so far south along the Pacific Coast, it was the result of a treaty between Russia and the United Kingdom (which ruled Canada); when the United States bought Alaska from Russia, the territory limits established went with it, although the eastern part of the border was in dispute for some time until a British arbiter ruled in the U.S.' favor.
Lake Ontario is located along the border of Canada and the United States.
At the time, many sailors and navigators believed that there was a water route called the Northwest Passage that ran from the Atlantic Ocean to the Pacific Ocean along the border of the modern U.S. and Canada. He took that route.
Canada
There were more and more terrorists sneaking across the border from Canada to the US. Both countries agreed to beef up security along the border.
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The Famous river of DEVEONforms the western border.
It is on the northeast border of the Pacific Ocean, on the so-called "Ring of Fire" created by the subduction of oceanic crust along the borders of continents.
Raccoons are found only across extreme southern Canada along the border with the United States,
There are border crossings into Canada along the Niagra River.AnswerThe states that border New York are Vermont, Massachutchetts, Pennyslyvania, New Jersey, and Connecticut.
Canada's Yukon Territory is roughly triangular in shape, and most of its western border is shared with Alaska along 141 degrees west longitude. Most of its southern border is shared with the Canadian province of British Columbia, along 60 degrees north latitude. The Arctic Ocean lies to the north. Yukon Territory shares a border with Canada's Northwest Territories to the east, along an irregular line west of the Mackenzie River. There is a possibility that, if the glaciers melt, Yukon Territory might also be bordered on the Pacific Ocean in its southwest corner.