Steamboats of the Willamette River
The Willamette River flows northwards down the Willamette Valley until it meets the Columbia River at a point 101 miles from the Pacific Ocean, in the U.S. state of Oregon. == Route and early operations == In the natural condition of the river, Portland was the farthest point on the river where the water was deep enough to allow ocean-going ships.
Source: Wikipedia — Steamboats of the Willamette River (CC BY-SA 4.0)