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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 .
The North Cascades are a section of the Cascade Range of western North America.They span the border between the Canadian province of British Columbia and the U.S. state of Washington and are officially named in the U.S. and Canada [1] as the Cascade Mountains. [2]
As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. [1]
As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. [7]
The two together are known as the Border Peaks or American-Canadian Border Peaks and are most easily visible within nearby settled parts of Canada from the northern part of Sumas Prairie and the western part of Chilliwack Prairie in the area of Greendale, which is just east of the boundary between the cities of Chilliwack and Abbotsford.
Within these two eco-regions are five level four eco-regions: the Western Cascade Mountain Highlands, Cascade Crest Montane Forest, and Cascades Subalpine/Alpine within the Cascades eco-region and the Yakima Plateau and Slopes and Grand Fir Mixed Forest within the Eastern Cascades Slopes and Foothills eco-region.
The North Cascades are a subrange of the Cascade Range System, the official name of the Canadian section is the Cascade Mountains. For the North Cascades section in Washington state, see Category: North Cascades of Washington (state) .
The Cascade Mountains form the northern portion of the Cascade-Sierra province. The Cascades were created from thousands of small, short-lived volcanoes along the Cascadia subduction zone [5] that over millions of years built a foundation of lava and volcanic debris on which the mountains rise.