Clatsop Plains
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The Clatsop Plains are an area of wetlands and sand dunes between the Coast Range and Pacific Ocean in northwestern Oregon in the United States. They stretch from near the mouth of the Columbia River south to the vicinity of Tillamook Head near Seaside. The plains are drained by several coastal rivers include the Skipanon River and Lewis and Clark River, which flow parallel to the coast and empty into the Columbia at Youngs Bay near Astoria. The plains are named for the Clatsop tribe of Native Americans who lived in the area at the time of the arrival of Europeans at turn of the 19th century.