The Tualatin River is a tributary of the Willamette River in Oregon in the United States. The river is about 83 miles (134 km) long, and it drains a fertile farming region called the Tualatin Valley southwest and west of Portland at the northwest corner of the Willamette Valley. There are approximately 500,000 people residing on 15 percent of the land in the river's watershed.
Mouth of the Tualatin River
The Tualatin as it passes Rivergrove on the left and Tualatin on the right
The Willamette River is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is 187 miles (301 km) long, lying entirely in northwestern Oregon in the United States. Flowing northward between the Oregon Coast Range and the Cascade Range, the river and its tributaries form the Willamette Valley, a basin that contains two-thirds of Oregon's population, including the state capital, Salem, and the state's largest city, Portland, which surrounds the Willamette's mouth at the Columbia.
The Willamette passing through Downtown Portland in the 1980s
Ocean-going cargo ship anchored at the mouth of the Willamette
The Multnomah Channel from the Sauvie Island Bridge
The Oregon Route 34 bridge across the Willamette River at Corvallis is a mid-valley highway crossing.
