| Answer | % Correct |
|---|---|
| Columbia River | 88%
|
| Snake River | 81%
|
| Willamette River | 79%
|
| Clackamas River | 69%
|
| Deschutes River | 66%
|
| John Day River | 66%
|
| Umpqua River | 64%
|
| Malheur River | 57%
|
| Nehalem River | 51%
|
| Crooked River | 48%
|