Marys River
| Type | Value | Time | Change/hr | Status |
|---|---|---|---|---|
| flow | 536 | -3.00 | falling | |
| gauge | 7.4 | -0.02 | stable | |
| temperature | 47.7 | 0.40 | stable |
| Class | I II |
| State | Oregon |
| Drainage | Willamette |
| Region | Middle Willamette |
| Gauge | Philomath |
| Season | Nov-Apr |
| Length | 19 mi |
| Gradient | 10 ft/mi |
| Elevation Loss | 200 ft |
| Scenery | rural |
| Remoteness | Not Remote |
| Nature | Continous |
| Optimal Flow | 500 CFS |
| High Flow | 1,500 CFS |
| Low Flow | 300 CFS |
| Okay Flow | 300 CFS – 1,500 CFS |
| Gauge Location | 44.526200, -123.335000 |
| Put-in | 44.581217, -123.507605 |
| Take-out | 44.534244, -123.373460 |