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Middle Santiam River facts for kids

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Middle Santiam River
Middle Santiam River is located in Oregon
Middle Santiam River
Location of the mouth of the Middle Santiam River in Oregon
Country United States
State Oregon
County Linn
Physical characteristics
Main source Iron Mountain
Cascade Range, Willamette National Forest, Linn County, Oregon
4,149 ft (1,265 m)
44°24′09″N 122°09′43″W / 44.40250°N 122.16194°W / 44.40250; -122.16194
River mouth South Santiam River
Foster Reservoir, Linn County, Oregon
640 ft (200 m)
44°24′58″N 122°38′02″W / 44.41611°N 122.63389°W / 44.41611; -122.63389
Length 39 mi (63 km)
Basin features
Basin size 104 sq mi (270 km2)

The Middle Santiam River is a tributary of the South Santiam River, 38.5 miles (62.0 km) long, in western Oregon in the United States. It drains a remote area of the Cascade Range east of Sweet Home in the watershed of the Willamette River.

It rises in the Cascades in eastern Linn County in the Willamette National Forest, about half a mile west of Iron Mountain. It flows briefly north, then generally west and southwest through the mountains and Middle Santiam Wilderness. In central Linn County it is impounded at the Green Peter Dam to form the Green Peter Reservoir. Approximately 4 miles (6 km) downstream from the dam it joins the South Santiam from the northeast as an arm of Foster Reservoir.

location geolocation usgs map
mouth, Foster Lake 44°24′58″N 122°38′02″W / 44.416235°N 122.633972°W / 44.416235; -122.633972 (Middle Santiam River mouth RM 0) Sweet Home
junction Quartzville Creek
Green Peter Lake
44°28′34″N 122°30′02″W / 44.476235°N 122.500638°W / 44.476235; -122.500638 (Middle Santiam River RM 8.9) Cascadia
RM 15.4 44°30′01″N 122°23′44″W / 44.500401°N 122.395636°W / 44.500401; -122.395636 (Middle Santiam River RM 15.4) Yellowstone Mountain
RM 25.3 44°31′01″N 122°15′02″W / 44.517068°N 122.250632°W / 44.517068; -122.250632 (Middle Santiam River RM 25.3) Chimney Peak
source 44°24′09″N 122°09′43″W / 44.402623°N 122.162015°W / 44.402623; -122.162015 (Middle Santiam River source, RM 38.5) Harter Mountain


Named tributaries of the Middle Santiam River from source to mouth are Cougar, Holman, Lake, South Pyramid, Bachelor, Pyramid, Donaca, Jude, and Egg creeks, followed by Fitt, Chimney, Sixes, Bear, and Twin Falls creeks. Below that are Cougar, Crash, Maple, Elk, Knickerbocker and Cave creeks. Then come Tally, Quartzville, Whitcomb, Rumbaugh, and Thistle creeks. Finally are Green Peter, Little Bottom, Alder, Coal, and Lewis creeks.

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