Nehalem River is a river on the Pacific coast of northwest Oregon in the
States, approximately long. It drains part of the
Northern Oregon Coast
Range northwest of Portland, originating
on the east side of the mountains and flowing in a loop around the
north end of the range near the mouth Columbia River.
Its watershed of
includes an important timber-producing
region of Oregon that was
the site of the Tillamook Burn
its upper reaches it flows through long narrow valley of small
mountain communities but is unpopulated along most of its lower
reaches inland from the coast.
in the northeast corner of Tillamook County, in the Tillamook State Forest. It initially flows northeast, across the
northwest corner of Washington County and into western Columbia County, past Vernonia and Pittsburg. At Pittsburg, it looks
to the northwest and west into Clatsop County, then flows southwest back into northern Tillamook
County. It enters Nehalem Bay on the Pacific in an estuary
at Nehalem, about
west-northwest of Portland.
Near its mouth on the Pacific,
the river passes under U.S. Route 101
receives the Salmonberry
River from the east in northern Tillamook County.
It receives the North Fork Nehalem River from the north about
northwest of Nehalem, just before entering Nehalem Bay.