| South Fork Crooked River | |
| Map Size: | 300 |
| Pushpin Map: | USA Oregon |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of South Fork Crooked River in Oregon |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Oregon |
| Subdivision Type4: | County |
| Subdivision Name4: | Deschutes and Crook |
| Length: | 76miles[1] |
| Source1: | Ram Lake (dry) |
| Source1 Location: | near Hampton, Deschutes County |
| Source1 Coordinates: | 43.6486°N -120.3944°W[2] |
| Source1 Elevation: | 4779feet[3] |
| Mouth: | Crooked River |
| Mouth Location: | near Paulina, Crook County |
| Mouth Coordinates: | 44.1014°N -120.0511°W |
| Mouth Elevation: | 3622feet |
| Basin Size: | 1530sqmi[4] |
The South Fork Crooked River is a tributary, 76miles long, of the Crooked River in the U.S. state of Oregon.[1] 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 6miles 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 125miles from its confluence with the Deschutes River.[5] [6]
The South Fork Crooked River drains a sparsely populated basin of 1530mi2. About 75 percent of the basin is rangeland; the rest is a mixture of forests, pasture, and hay fields. Precipitation varies from less than 9inches near the river's source to as much as 35inches in the Ochoco Mountains on the northeastern edge of the watershed.[4]