North Cascades National Park Glaciers / Glacial Features

Glaciers glisten as the most striking mountaintop feature of the North Cascades. Boasting over 300 glaciers and countless snowfields, the North Cascades National Park Service Complex is one of the snowiest places on earth and the most heavily glaciated area in the United States outside of Alaska.

Glaciers form when more snow accumulates in winter than melts or evaporates during the following summer. As the snow compacts into ice, it slowly moves downhill. As glaciers move, they gouge and scrape the land redefining the landscape. The North Cascades glaciers may be disappearing; most have shrunk dramatically during the last century. This is due to the combined effects of less precipitation and warmer summers, which most scientists now attribute to global warming.

Glaciers mirror the trends of climate change, resulting in life changes through soil development and distribution of vegetation. Glaciers are indicators of climate changes such as temperature and precipitation. As reservoirs of snow from past winters, pollutants may wash into mountain lakes and streams where they enter the food chain. Salmon and other aquatic life, along with plant and animal life could encounter difficulties as glaciers disappear.

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