The South Santiam River is a tributary of the Santiam River, about 69 miles (111 km) long, in western Oregon in the United States. It drains an area of the Cascade Range into the Willamette Valley east of Corvallis.
It rises in the Cascades in southeastern Linn County in the Willamette National Forest at 44.374291°N 122.218128°W / 44.374291; -122.218128 (South Santiam River source). From this source, the confluence of Sevenmile and Latiwi creeks, it flows briefly north, then generally west through the Western Cascades and Cascadia. It then flows a handful of miles before entering Foster R...
Click any point for details. Sections without stored geometry are drawn as straight put-in → take-out lines — actual courses follow the river.