That river would be the mighty Columbia.
Roll on Columbia, roll on!
Countries that border the northeast Pacific Ocean include the United States, Canada, Russia, and Japan. These countries have coastlines along the Pacific Ocean in the northeastern region.
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.
Canada has the longest coastline in the world, measuring over 202,000 kilometers due to its vast border along the Atlantic, Pacific, and Arctic Oceans.
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
Nevada's border is closer to the Pacific Ocean compared to Idaho. Nevada shares a border with California, which has a coastline along the Pacific Ocean, while Idaho is landlocked and does not directly border the ocean.
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.
high
Countries with coastlines along the Pacific Ocean include the United States, Canada, Mexico, and countries in Central America such as Guatemala and Costa Rica. In South America, nations like Chile and Peru have Pacific coastlines. Additionally, countries in Asia, including Japan, China, and the Philippines, also border the Pacific Ocean. Oceania is represented by nations such as Australia and New Zealand.
The Famous river of DEVEONforms the western border.