the Umatilla river
check google earth
The Columbia River until an area between Umatilla, OR and Wallula, WA it then goes east to the Snake River and Idaho.
If you are traveling east from the Portland area then Hood River comes first. But if you are travel west from say the Pendleton area the The Dalles would come first.
The Grammart river flows north, and it is in Oregon.
snake
the Columbia River flows mostly through the stae of Washington
oregon county at the time
its called im a mooron
The Columbia River
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.
To travel from the Mississippi River to Oregon, you can take the Missouri River, which is a major tributary of the Mississippi. From the Missouri River, you can navigate to the Columbia River by following various waterways and rivers that connect through the Great Plains and the mountainous regions of the West. Ultimately, the Columbia River flows into the Pacific Ocean, near the state of Oregon.
the Columbia river is in Washington state and originates in British Columbia and flows through gorges it created to its mouth in the Pacific near Portland, Oregon