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The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as many of those in the North Cascades , and the notable volcanoes known as the High Cascades .
Stevens Pass, located in the Cascade Range. The U.S. state of Washington, located in the Pacific Northwest, has several major mountain ranges that are traversed various passes. The state is divided by the Cascade Range, which have the highest passes, and is also home to the Olympic Mountains, Selkirk Mountains, and Blue Mountains.
The Cascades is bordered on the north by the North Cascades ecoregion, on the south by the Klamath Mountains ecoregion, on the east by the Eastern Cascades Slopes and Foothills, and on the west by the Willamette Valley and Puget Lowland ecoregions. It been subdivided into six Level IV ecoregions in Washington and Oregon, as described below ...
Mount Hood is the highest summit of the U.S. State of Oregon. This article comprises three sortable tables of major mountain peaks [1] of the U.S. State of Oregon. The summit of a mountain or hill may be measured in three principal ways: The topographic elevation of a summit measures the height of the summit above a geodetic sea level.
The level III ecoregions in Oregon are the Coast Range (1), Willamette Valley (3), Cascades (4), Eastern Cascades Slopes and Foothills (9), Columbia Plateau (10), Blue Mountains (11), Snake River Plain (12), Klamath Mountains (78), and Northern Basin and Range (80). (Compare to map of Level IV ecoregions.)
The Cascadia Bioregion encompasses all of the state of Washington, all but the southeastern corner of Idaho, and portions of Oregon, California, Nevada, Utah, Wyoming, Montana, Alaska, Yukon, and British Columbia. Bioregions are geographically based areas defined by land or soil composition, watershed, climate, flora, and fauna.