Willamette River In Portland, Oregon
The river forms part of
the boundary of the following counties: Benton,
Linn, Polk, Marion, Yamhill and Clackamas.
Tributaries of the Willamette River also drain
some or all of Lane, Washington and Multnomah
Although riverboats navigated the upstream part of the Willamette into the first decades of the 20th century, currently there is little commercial traffic on the river above the Willamette Falls. The Willamette Falls Locks allow boat traffic, primarily recreational vessels, around the falls. The river is crossed by several ferries along its route in the Willamette Valley.