Portland, Oregon is located right on the Columbia River ( or next to) . The Columbia river forms the border between Washington state and Oregon. So, Portland is very near the Washington state line. The City of Vancouver, Washington is just north over the WAsh/Ore border or just over the Columbia River.
Portland.
Washington and Oregon border the Columbia River.
Columbia river
I live in the wonderful state of Oregon, only about 20 miles from the Columbia. It originates in Canada, comes south into Washington and then makes a westward turn to form most of the state line between Washington & Oregon. It is the largest American river to flow into the Pacific and the 4th larges river in the USA. It's BIG & beautiful. Portland, Oregon is about 90 miles inland, but we get ships from the ocean because the river is deep enough to handle them.
Columbia River
If you mean Oregon and Washington, you'd be looking for the Columbia River...
The Columbia River.
Columbia River
The Columbia River divides Washington and Oregon. The Columbia River is the largest river, at 1,240 miles, that flows into the Pacific Ocean.
The Columbia River.
The Columbia River separates Washington State and Oregon.
Columbia river