Course
The Lewis and Clark River rises south of Saddle Mountain in the central Clatsop County. It flows generally west and slightly north. Near Seaside it turns north and flows parallel to the coast, approximately 5 miles (8.0 km) inland. It enters the Youngs Bay, part of the Columbia River, at Astoria. The site of Fort Clatsop is approximately 1.5 miles (2.4 km) upstream from the mouth of the river.
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