| Cougar Canyon | Whitman, WA | 2.7 miles | SE |
| The Gap | Kootenai, ID | 68.2 miles | NE |
| Homly Channel | Benton, WA | 69.5 miles | SW |
| Hanford Reach | Benton, WA | 69.8 miles | SW |
| West Channel | Benton, WA | 70.3 miles | SW |
| Wallula Gap | Walla Walla, WA | 73.6 miles | SW |
| Spawning Channel | Umatilla, OR | 90.8 miles | SW |
| McNary Range Channel | Umatilla, OR | 90.9 miles | SW |
| Irrigon Middle Range Channel | Morrow, OR | 96.9 miles | SW |
| Irrigon Lower Range | Morrow, OR | 99.7 miles | SW |
| South Channel | Morrow, OR | 104 miles | SW |
| South Channel Columbia River | Benton, WA | 104.1 miles | SW |
| North Channel Columbia River | Benton, WA | 104.3 miles | SW |
| Messinger Upper Range | Morrow, OR | 106.1 miles | SW |
| Messinger Middle Range | Morrow, OR | 106.9 miles | SW |
| Messinger Lower Range | Morrow, OR | 108.7 miles | SW |
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