Columbia River depth map (nautical chart)The marine chart shows water depth and hydrology on an interactive map. The source of the Columbia River Columbia Lake (British Columbia, Canada). The mouth of is Pacific Ocean at Clatsop County (OR) and Pacific County (WA). Average discharge: 265,000 cu ft/s (7,500 m3/s).
Oregon, Washington, British Columbia (Canada)
1,243 mi (2,000 km)
258,000 sq mi (670,000 km2)
Portland (OR), Vancouver (WA)