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The Blue Mountain Basins ecoregion is characterized by flat to rolling alluvial valleys containing floodplains, fluvial terraces, and scattered buttes in the Wallowa, Grande Ronde, and Baker valleys. The Wallowa Valley also includes outwash terraces, moraines, and a low elevation basalt plateau. Elevation varies from 2,600 to 5,000 feet (792 to ...
The Blue Mountains are a mountain range in the northwestern United States, located largely in northeastern Oregon and stretching into extreme southeastern Washington. The range has an area of about 15,000 square miles (39,000 km 2 ), stretching east and southeast of Pendleton, Oregon , to the Snake River along the Oregon– Idaho border.
Exceptions occur at higher elevations in the Blue Mountains and the Wallowa Mountains to the northeast, which get 50 to 80 inches (1,300 to 2,000 mm) a year. [2] Across Oregon, the wet season runs from November through March, when the jet stream is strongest in the Northern Hemisphere. Precipitation is less in the months between winter and ...
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Climate change will push snow higher in California's Sierra Nevada by the second half of the century, bringing more winter rain and faster mountain runoff.
The Southern Cascades ecoregion is lower in elevation and less rugged than the surrounding regions and is characterized by gently sloping mountains and broad valleys. Elevation varies from 1,400 to 5,300 feet (430 to 1,620 m). The climate is drier than other parts of the Cascades, and the vegetation reflects the long summer drought.
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