Columbia River | |
---|---|
Source | Columbia Lake |
Mouth | Pacific Ocean |
Length | 2000 km |
Basin Area | 668,000 km² |
The Columbia River is the largest river in Cascadia. The river's headwaters are in the Rocky Mountains of British Columbia, and it then flows first northwest and then south into Washington. The last portion of its route forms the border between Washington and Oregon, and its mouth is at Astoria on the Pacific coast. It has the greatest flow of any North American river draining into the Pacific.