South Fork Crooked River

The South Fork Crooked River is a tributary, 76 mi long, of the Crooked River in the U.S. state of Oregon. Starting southeast of Hampton in Deschutes County, the South Fork flows east from near Ram Lake (dry). It passes under U.S. Route 20 at Hampton, then continues east and north for about 6 mi before entering Crook County. Shortly thereafter, east of Hampton Buttes, it receives Buck Creek from the right and then passes through Logan Reservoir. Flowing north, it receives Sand Hollow Creek from the left, then Twelvemile Creek from the right before crossing under Oregon Route 380 (Southeast Paulina Highway). Just north of the highway, the river joins Beaver Creek to form the Crooked River 125 mi from its confluence with the Deschutes River.

The South Fork Crooked River drains a sparsely populated basin of 1530 mi2. About 75 percent of the basin is rangeland; the rest is a mixture of forests, pasture, and hay fields. Precipitation varies from less than 9 in near the river's source to as much as 35 in in the Ochoco Mountains on the northeastern edge of the watershed.