Cascades
That would be the Columbia River. This river separates approximately two thirds of southern Washington from northern Oregon. At a place on the 46th parallel north this river total enters the state of Washington, and this parallel becomes the border line that separates the two states.
The Columbia River separates Washington and Oregon. It runs from British Columbia, Canada, through Washington state, and forms part of the border between Washington and Oregon before emptying into the Pacific Ocean.
The Columbia River
The lake that separates Washington and Oregon is the Columbia River. While it is primarily a river, it forms a natural boundary between the two states and has several large reservoirs along its course, such as Lake Bonneville. However, there is no single lake that distinctly serves as the border between the two states. The Columbia River is crucial for navigation, hydropower, and recreation in the region.
The Columbia River
The Columbia River separates Washington State and Oregon.
The Columbia River
Washington State is approximately 240 miles long from its northern boundary with Canada to its southern boundary with Oregon.
The Pacific Ocean, Canada, Idaho, and the Columbia River separates us from Oregon
Oregon Washington California
No. Washington, Idaho, Montana, North Dakota etc. are.