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.
The river are flowing northward between the Oregon Coast Range and the Cascade Range. Its tributaries are flowing northward between the Oregon Coast Range and the Cascade Range. The river form the Willamette Valley-thirds of Oregon's population. Its tributaries form the Willamette Valley-thirds of Oregon's population. This is including the state capital. This is including Salem. This is including the state's largest city. The state's largest city is Portland. The Willamette Valley is a basin. This basin contains two.