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Columbia River, Cascade Mountains, Oregon, (1876) by Vincent Colyer (oil on canvas). Beacon Rock is visible on the left. Detail from the Lewis and Clark Expedition map. The Willamette River is shown as the "Multnomah", while the Snake River is "Lewis's River". (See complete map.)
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]
The Columbia River Estuary is situated on the Oregon – Washington border and the Pacific Coast of the United States. It was traditionally inhabited by the Chinook Native Americans and discovered by settlers in 1788. The Estuary plays host to a plethora of species of marine and terrestrial flora and fauna, and multiple conservation ...
The Historic Columbia River Highway is an approximately 75-mile-long (121 km) scenic highway in the U.S. state of Oregon between Troutdale and The Dalles, built through the Columbia River Gorge between 1913 and 1922. As the first planned scenic roadway in the United States, it has been recognized in numerous ways, including being listed on the ...
River mile Carries Location Coordinates Oregon - Washington; Astoria-Megler Bridge: 13.5: US 101: Astoria, Oregon to Megler, Washington: Wahkiakum County Ferry: 43.2 SR 409: Westport, Oregon to Puget Island, Washington
The Columbia Plateau covers much of the Columbia River Basalt Group, shown in green on this map. The Washington cities of Spokane, Yakima and Pasco, and the Oregon city of Pendleton, lie on the Columbia Plateau. The Columbia Plateau is a geologic and geographic region that lies across parts of the U.S. states of Washington, Oregon, and Idaho.
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