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The Willamette Valley (/ w ɪ ˈ l æ m ɪ t / ⓘ wil-AM-it) is a 150-mile (240 km) long valley in Oregon, in the Pacific Northwest region of the United States. The Willamette River flows the entire length of the valley and is surrounded by mountains on three sides: the Cascade Range to the east, the Oregon Coast Range to the west, and the ...
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The Willamette Valley ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency in the U.S. states of Oregon and Washington.Slightly larger than the Willamette Valley for which it is named, the ecoregion contains fluvial terraces and floodplains of the Willamette River system, scattered hills, buttes, and adjacent foothills.
The Willamette River Valley. The climate of Willamette Valley is mild year-round. Winters are typically cool and wet, summers are dry and warm; heat above 90 °F (32 °C) only occurs 5 to 15 days per year, and the temperature drops below 0 °F (−18 °C) once every 25 years.
Willamette Valley (ecoregion), an area that includes the Willamette Valley and adjacent parts of Washington; Willamette, Oregon, an unincorporated community that is now part of West Linn; Willamette National Forest, a National Forest in western Oregon; Willamette Falls, a natural waterfall on the Willamette River between Oregon City and West ...
Louis LaBonté, Joseph Gervais, Étienne Lucier, Louis Kanota, and Louis Pichette (dit DuPré) remained in the Willamette Valley as free trappers. [50] Meanwhile, in 1821 the HBC merged with the NWC. In 1825 a new Fort Vancouver headquarters was built on the north shore of the Columbia closer to the Willamette, and Fort George was closed.
Located 26 miles (42 km) upriver from the Willamette's mouth at Portland, Willamette Falls is a culturally significant site for many tribal communities in the region. Opened in 1873 and closed since 2011, the Willamette Falls Locks allowed boat traffic on the Willamette to pass into the main Willamette Valley.
The Chehalem Mountains are a mountain range located in the Willamette Valley in the U.S. state of Oregon.Forming the southern boundary of the Tualatin Valley, the Chehalems are the highest mountains in the Willamette Valley. [1]