Light snow on the last traces of fall color and a layer of ice on Highwood Lake illustrate the changing seasons at Mount Shuksan in Washington's North Cascades. Mount Shuksan, located in North Cascades National Park, is 9,131 feet (2,783 meters) tall and was formed about 120 million years ago when two of Earth's plates collided and were thrust upward in an event known as the Easton collision.
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