what is the name of the river that forms the northern border of oregon
Oregon Oregon (/ˈɔːrɪɡən/ ( listen)[7]) is a state in the Pacific Northwest region on the West coast of the United States. The Columbia River delineates much of Oregon's northern boundary along Washington state, while the Snake River delineates much of its eastern boundary along Idaho. The parallel 42° north delineates the southern boundary with California and Nevada. Oregon is one of only three states of the contiguous United States to have a coastline on the Pacific Ocean.
The Dalles, Oregon The Dalles /ˈdælz/ is the county seat and largest city of Wasco County, Oregon, United States. The population was 13,620 at the 2010 census, and is the largest city on the Oregon side along the Columbia River outside the Portland Metropolitan area.
Columbia River The Deschutes River joins the Columbia near The Dalles. Between The Dalles and Portland, the river cuts through the Cascade Range, forming the dramatic Columbia River Gorge. No other rivers except for the Klamath and Pit River completely breaches the Cascadesâ€”the other rivers that flow through the range also originate in or very near the mountains. The headwaters and upper course of the Pit River are on the Modoc Plateau; downstream the Pit cuts a canyon through the southern reaches of the Cascades. In contrast, the Columbia cuts through the range nearly a thousand miles from its source in the Rocky Mountains. The gorge is known for its strong and steady winds, scenic beauty, and its role as an important transportation link.[14] The river continues west, bending sharply to the north-northwest near Portland and Vancouver, Washington, at the Willamette River confluence. Here the river slows considerably, dropping sediment that might otherwise form a river delta. Near Longview, Washington and the Cowlitz River confluence, the river turns west again. The Columbia empties into the Pacific Ocean just west of Astoria, Oregon, over the Columbia Bar, a shifting sandbar that makes the river's mouth one of the most hazardous stretches of water to navigate in the world.[15] Because of the danger and the many shipwrecks near the mouth, it acquired a reputation as the "Graveyard of Ships".[16]
Euphrates The Euphrates (/