The Oregon Coast is a region of the U.S. state of Oregon. It runs generally north–south along the Pacific Ocean, forming the western border of the state; the region is bounded to the east by the Oregon Coast Range. The Oregon Coast stretches approximately from the Columbia River in the north to the California state border in the south. The Oregon Coast is not a specific geological, environmental, or political entity, but instead includes the entire coastline of Oregon, including the Columbia River Estuary.