A watershed is a geographic area that works like a great big bowl to link land, water, and people. The Tualatin River Watershed includes 712 square miles and ranges from densely populated areas to agricultural areas and the forests of Oregon’s Coast Range. Explore more of our watershed with the Watershed Navigator.
The 80-mile-long Tualatin River is unlike most rivers in the Northwest. It meanders slowly through relatively flat terrain, draining more than 700 square miles of forested, agricultural, and urban areas before joining the Willamette River. The Tualatin is Washington County’s only river and an important resource for the region. The river is used for regional drinking water supply and agricultural irrigation. In addition, canoeing, fishing, and wildlife viewing draw thousands of outdoor enthusiasts each year.
Tualatin River Status
Get current information on water levels, flow, temperature, and more.
- US Geological Survey
- USGS Rainfall Network
- Watermasters
- US Bureau of Reclamation
- Jackson Bottom Wetlands
- Tualatin River Flow Management Committee – Annual Flow Reports
- Looking for flooding information?