Zone: Zone 5
Approximate length of main stem of river: 187 miles
Watershed Area: 11,500 square miles
The Willamette River drains most of Western Oregon and the west side of the Cascade Mountains. It is the defining feature of the City of Portland.
Approximate length of main stem of river: 187 miles
Watershed Area: 11,500 square miles
The Willamette River drains most of Western Oregon and the west side of the Cascade Mountains. It is the defining feature of the City of Portland.