Chehalis River (Washington)

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Chehalis River
Chehalis River Valley (left), Grays Harbor (center) and Satsop River Valley (foreground)

Chehalis River Valley (left), Grays Harbor (center) and Satsop River Valley (foreground)

Water code US1503931
location Washington (USA)
River system Chehalis River
Drain over Grays Harbor  → Pacific Ocean
source in Lewis County
46 ° 27 ′ 6 ″  N , 123 ° 17 ′ 30 ″  W.
Source height 305  m
muzzle Grays Harbor ( Pacific Ocean ) near Aberdeen , Grays Harbor County Coordinates: 46 ° 57 ′ 29 "  N , 123 ° 50 ′ 5"  W 46 ° 57 ′ 29 "  N , 123 ° 50 ′ 5"  W
Mouth height m
Height difference 305 m
Bottom slope 1.6 ‰
length 185 km
Catchment area 6889 km²
Drain MQ
182 m³ / s
Right tributaries South Fork Chehalis River , Newaukum River , Skookumchuck River , Satsop River , Wynoochee River , Wishkah River
Small towns Aberdeen , Centralia , Chehalis

The Chehalis River is a 185 km long river in the state of Washington in the United States . It drains an area of ​​6889 km². It originates in several arms in the southwest of the state and flows first to the east and then in a long arc over the north to the west before reaching the sea at Grays Harbor , an estuary in the Pacific Ocean .

The Chehalis River forms the border between the Olympic Peninsula with the Olympic Mountains in the north and the Willapa Hills in the south.


The starting point of the Chehalis River is the confluence of the West Forks Chehalis River and East Fork Chehalis River in southwest Lewis County . From there, the river flows east and then north, collecting water from streams that drain the Willapa Hills and other low mountain ranges in southwest Washington. A few kilometers west of the city of Chehalis , the South Fork Chehalis River flows into it. The Newaukum River has its mouth at Chehalis, after which the river turns north. The Skookumchuck River flows into Centralia . Below Centralia, the river curves north and then west through Rainbow Falls State Park , receiving the waters of the Black River , which drains the Black Hills to the north, and the Satsop River and Wynoochee River , which flow near Montesano . Both rivers come from the southern part of the Olympic Mountains .

Below Montesano, the river is more and more influenced by the tides . It widens into an estuary called Grays Harbor. A little east of the city of Aberdeen , which is just above the river mouth, the Chehalis River receives the Wishkah River and a little further west, between Aberdeen and Hoquiam , the Hoquiam River flows . From this point on the river is called Grays Harbor. Before the estuary empties into the Pacific Ocean, the Humptulips River flows into it .

Individual evidence

  1. Chehalis River ( Memento of the original from March 30, 2005 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. , The Columbia Gazetteer of North America @1@ 2Template: Webachiv / IABot /
  2. Chehalis River Council: Overview of the Chehalis River Basin ( Memento of July 21, 2011 in the Internet Archive ), status 1992

Web links