| Treat River | |
| Map Size: | 300 |
| Pushpin Map: | USA Oregon |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the Treat River in Oregon |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Oregon |
| Subdivision Type4: | County |
| Subdivision Name4: | Lincoln County |
| Source1: | Central Oregon Coast Range |
| Source1 Location: | Siuslaw National Forest |
| Source1 Coordinates: | 45.0044°N -123.7956°W[1] |
| Source1 Elevation: | 2064feet[2] |
| Mouth: | Salmon River |
| Mouth Coordinates: | 45.02°N -123.8503°W |
| Mouth Elevation: | 223feet |
The Treat River is a short tributary of the Salmon River in Lincoln County, in the U.S. state of Oregon. It begins in the Siuslaw National Forest in the Central Oregon Coast Range and flows generally northwest. It enters the larger stream between the H. B. Van Duzer Forest State Scenic Corridor along Oregon Route 18 and the unincorporated community of Rose Lodge. It has no named tributaries.[3]
According to the Northwest Waterfall Survey, there is a waterfall about 100feet upstream of the mouth of the Treat River. Its unofficial name is Treat River Falls, the survey says, though that may be a pseudonym for Anna's Falls.[4]