South Yamhill River
| South Yamhill River | |
|---|---|
Bridge over the river at Sheridan | |
Location of the mouth of South Yamhill River in Oregon | |
| Etymology | Uncertain but probably after a local Kalapuya tribe |
| Location | |
| Country | United States |
| State | Oregon |
| Counties | Polk and Yamhill |
| Physical characteristics | |
| Source | Northern Oregon Coast Range |
| • location | Siuslaw National Forest, in western Yamhill County, Oregon |
| • coordinates | 45°06′38″N 123°43′40″W / 45.11056°N 123.72778°W |
| • elevation | 551 ft (168 m) |
| Mouth | Yamhill River |
• location | between McMinnville and Dayton, Yamhill County, Oregon |
• coordinates | 45°13′33″N 123°08′41″W / 45.22583°N 123.14472°W |
• elevation | 75 ft (23 m) |
| Length | 60 mi (97 km) |
| Basin size | 492 sq mi (1,270 km2) |
| Discharge | |
| • location | McMinnville, Oregon, 5.6 miles (9.0 km) from mouth |
| • average | 1,801 cu ft/s (51.0 m3/s) |
| • minimum | 0.58 cu ft/s (0.016 m3/s) |
| • maximum | 47,100 cu ft/s (1,330 m3/s) |
The South Yamhill River is a tributary of the Yamhill River, approximately 60 miles (97 km) long, in northwest Oregon in the United States. It drains an area of the Northern Oregon Coast Range, as well as part of the Willamette Valley west of the Willamette River.