South Fork Clackamas River

South Fork Clackamas River
South Fork (right) entering main stem at Big Cliff (left)
Location of the mouth of the South Fork Clackamas River in Oregon
EtymologyClackamas tribe
Location
CountryUnited States
StateOregon
CountyClackamas
Physical characteristics
Sourcenear South Fork Mountain, Mount Hood National Forest
  locationCascade Range, Clackamas County
  coordinates45°05′31″N 122°15′12″W / 45.09194°N 122.25333°W / 45.09194; -122.25333
  elevation3,966 ft (1,209 m)
MouthClackamas River
  location
Big Cliff, Clackamas County
  coordinates
45°11′56″N 122°13′27″W / 45.19889°N 122.22417°W / 45.19889; -122.22417
  elevation
676 ft (206 m)
Length8 mi (13 km)
Basin size27.6 sq mi (71 km2)

The South Fork Clackamas River is a tributary, roughly 8 miles (13 km) long, of the Clackamas River in the U.S. state of Oregon. Beginning near South Fork Mountain in the western Cascade Range, the river flows generally north through Clackamas County to meet the larger river at Big Cliff. Most of the South Fork's drainage basin lies within the Mount Hood National Forest.

The lower reaches of the river are part of the National Wild and Scenic Rivers System. Recreational opportunities in the basin include hiking, camping, and fishing for trout. A 70-foot (21 m) waterfall prevents salmon and other migratory fish from swimming upriver beyond the first 0.4 miles (0.6 km).