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The Willamette River ( / wɪˈlæmɪt / ⓘ wil-AM-it) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is 187 miles (301 km) long, lying entirely in northwestern Oregon in the United States.
33,800 cu ft/s (960 m 3 /s) [5] The Willamette River is a 187-mile (301 km) tributary of the Columbia River in the U.S. state of Oregon. The upper tributaries of the Willamette originate in mountains south and southeast of the twin cities of Eugene and Springfield. Formed by the confluence of the Middle Fork Willamette River and Coast Fork ...
The Columbia River ( Upper Chinook: Wimahl or Wimal; Sahaptin: Nch’i-Wàna or Nchi wana; Sinixt dialect swah'netk'qhu) is the largest river in the Pacific Northwest region of North America. [11] The river forms in the Rocky Mountains of British Columbia, Canada.
The Columbia Slough is a narrow waterway, about 19 miles (31 km) long, in the floodplain of the Columbia River in the U.S. state of Oregon. From its source in the Portland suburb of Fairview, the Columbia Slough meanders west through Gresham and Portland to the Willamette River, about 1 mile (1.6 km) from the Willamette's confluence with the ...
Sternwheeler Albany on Willamette River, at Albany, Oregon Oswego Lake and Tualatin River. Sucker Lake, later called Oswego Lake, is a large lake south of Portland, about half the distance to Oregon City. (The current Oswego Lake is a larger version of the original lake, formed by a dam on the east end.)
The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to 4,000 feet (1,200 m) deep, the canyon stretches for over eighty miles (130 km) as the river winds westward through the Cascade Range, forming the boundary between the state of Washington to the north and Oregon to the south. [1]
Sauvie Island, in the U.S. state of Oregon, originally Wapato Island or Wappatoo Island, is the largest island along the Columbia River, at 26,000 acres (10,522 ha), and one of the largest river islands in the United States. It lies approximately ten miles northwest of downtown Portland, between the Columbia River to the east, the Multnomah ...
The Willamette River flows northwards down the Willamette Valley until it meets the Columbia River at a point 101 miles (163 km) from the mouth of the Columbia. In the natural condition of the river, Portland was the farthest point on the river where the water was deep enough to allow ocean-going ships.