The Clatsop Plains are an area of wetlands and sand dunes between the Northern Oregon Coast Range and Pacific Ocean in northwestern Oregon in the United States. A wetland is an area of Land consisting of Soil that is Saturated with Moisture, such as a Swamp, Marsh, or Bog In physical Geography, a dune is a Hill of Sand built by Aeolian processes. The Northern Oregon Coast Range is the northern section of the Oregon Coast Range located in the northwest portion of the state of Oregon, United States The Pacific Ocean is the largest of the Earth 's Oceanic divisions Oregon ( is a state in the Pacific Northwest region of the United States. The United States of America —commonly referred to as the They stretch from near the mouth of the Columbia River south to the vicinity of Tillamook Head near Seaside. The Columbia River (known as Tillamook Head (455630 N 1235720 W is a high Promontory on the Pacific coast of northwest Oregon in the United States. Seaside is a city in Clatsop County, Oregon, United States. The name Seaside came from a summer resort built by the railroad magnate Ben Holladay 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 Skipanon River is a tributary of the Columbia River, approximately 7 mi (11 km long on the Pacific coast of northwest Oregon in the United The Lewis and Clark River is a tributary of the Columbia River, approximately 20 mi (32 km long in northwest Oregon in the United States. Youngs Bay, or Youngs River Bay is located in the northwestern corner of the U The City of Astoria is the County seat of Clatsop County, Oregon, United States. 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. The Clatsop are a small tribe of Chinookan -speaking Native Americans in the Pacific Northwest of the United States. Native Americans in the United States are the indigenous peoples from the regions of North America now encompassed by the continental United States The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar
These plains were developed from sand filling in the shoreline during the late Quarternary age. [1] The northern portion is a result of the creation of the south jetty on the Columbia River built in 1885. [1] Within the plain are several lakes including Cullaby, Smith, and Coffenbury which are filled by groundwater and not local streams or rivers. [1]
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