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Big River (Oregon) facts for kids

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Big River
Country United States
State Oregon
County Lane and Douglas
Physical characteristics
Main source Calapooya Mountains
Douglas County, Oregon
3,288 ft (1,002 m)
River mouth Coast Fork Willamette River
Lane County, Oregon
1,004 ft (306 m)
Length 12 mi (19 km)

The Big River is a tributary of the Coast Fork Willamette River, approximately 12 miles (19 km) long, in western Oregon in the United States. It drains an area of the Calapooya Mountains south of Eugene.

It rises in northern Douglas County, northwest of Huckleberry Mountain, approximately 20 miles (32 km) south-southeast of Cottage Grove at 43°32′25″N 122°53′52″W / 43.540398°N 122.897840°W / 43.540398; -122.897840 (Big River source). It flows northwest through Lane County to form the Coast Fork of the Willamette at its confluence with the Little River, about 15 miles (24 km) south of Cottage Grove at 43°35′43″N 123°04′03″W / 43.5953987°N 123.0675727°W / 43.5953987; -123.0675727 (Garoutte Creek mouth)

Course

Flowing northwest from the northern flanks of the Calapooya Mountains in Douglas County, Big River enters Lane County about 1 mile (1.6 km) downstream from the source. Box Canyon enters from the right at about river mile (RM) 9 or river kilometer (RK) 14. Big River receives Boulder Creek from the left, then Edwards Creek enters from the right at about RM 6 (RK 10). After receiving Bar Creek from the left and Martin Creek from the right, Big River meets Little River to form the Coast Fork Willamette River about 40 miles (64 km) from where the larger stream meets the Middle Fork Willamette River to form the Willamette River.

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