| Lyons Ferry Bridge | Franklin, WA | 21.2 miles | SE |
| Fisher Bridge | Whitman, WA | 26.3 miles | NE |
| Rocky Ford Bridge | Lincoln, WA | 28.7 miles | NW |
| Central Ferry Bridge | Whitman, WA | 28.8 miles | SE |
| Matlock Bridge | Whitman, WA | 31.3 miles | NE |
| Torrence Bridge | Whitman, WA | 36 miles | NE |
| Luckenbill Bridge | Walla Walla, WA | 48.8 miles | SW |
| Wickersham Bridge | Walla Walla, WA | 59.9 miles | SE |
| Indian Timothy Bridge | Asotin, WA | 59.9 miles | SE |
| Lewis Bridge | Lincoln, WA | 61.3 miles | NW |
| Madame Dorion Bridge | Walla Walla, WA | 65.4 miles | SW |
| Twin Bridges | Benton, WA | 65.9 miles | SW |
| Clearwater River Memorial Bridge | Nez Perce, ID | 68.3 miles | SE |
| Joe West Bridge | Umatilla, OR | 68.8 miles | SW |
| Dorothy Bridge | Umatilla, OR | 69.1 miles | SW |
| Vernita Bridge | Benton, WA | 71.4 miles | SW |
| Umatilla Bridge | Umatilla, OR | 83.8 miles | SW |
| Rieth Bridge | Umatilla, OR | 93.1 miles | SW |
| Klavano Bridge | Stevens, WA | 97.9 miles | NE |
| Steinmetz Bridge | Stevens, WA | 98.7 miles | NE |
| Cow Creek Bridge | Wallowa, OR | 106.5 miles | SE |
| Rice Creek Bridge | Idaho, ID | 111.5 miles | SE |
| Taylor Bridge | Gilliam, OR | 133.2 miles | SW |
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