Coast Fork Willamette River
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The Coast Fork Willamette River is one of several forks that unite to form the Willamette River in western Oregon in the United States. It is approximately 55 mi (89 km) long, draining an area of the mountains at the south end of the Willamette Valley south of Eugene. It is formed in southwestern Lane County by the confluence of Garoutte Creek and the Big River. It flows north through the mountains, through the Cottage Grove Lake reservoir, to Cottage Grove, where it receives the Row River from the southeast. It continues north past Creswell and joins the Middle Fork from the south, approximately 2 mi (3.2 km) southwest of Eugene, to form the Willamette.