Lewis

Lewis is best known within the United States for the Mount St. Helens National Volcanic Monument, part of which lies in Lewis County. This area of southwest Washington sits on the western side of the Cascade Range, where forested foothills and river valleys connect the interior mountains with lower country to the west. The Cowlitz River is a defining waterway, flowing through the county toward the Columbia River. Mount St. Helens’ 1980 eruption transformed the surrounding land and remains central to the area’s scientific and public identity. Chehalis, the county seat, and Centralia provide its principal urban services, while national-forest land covers much of the east. View additional webcams nearby to better understand how Lewis relates to the Cascade Range and the Cowlitz River valley.

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