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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

More Contact Info

Explore Portland's Watersheds

The City of Portland sits at the confluence of two of the nation's major river systems, the Columbia and the Willamette. Native salmon, steelhead, and other fish and wildlife species live within Portland’s urban boundary, and also migrate through Portland to other parts of the Willamette River Basin, Columbia River Basin, and beyond.

Everyone in Portland also lives in the watershed of a smaller local stream or waterway. Explore an interactive map to learn about the health of Portland’s rivers, streams, and watersheds in the Watershed Report Cards.

Link to interactive map of scores

Columbia River

All of Portland’s local watersheds are part of the Columbia River Basin

Columbia Slough Watershed

The slough flows for 18 miles from Fairview Lake to the Willamette River at Kelley Point Park

Fanno Creek Watershed

Fanno Creek begins in southwest Portland and flows to the Tualatin River

Johnson Creek Watershed

The creek crosses several jurisdictions before entering the Willamette River near Milwaukie

Tryon Creek Watershed

Tryon Creek flows through parts of southwest Portland to the Willamette River near Lake Oswego

Skyline West Area

An area of Portland’s West Hills that drains to the Tualatin River

Watershed Management Plan

Protecting natural resources and restoring critical ecosystems

City Green Blog

Updates on Environmental Services green infrastructure and watershed work