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Idaho Transportation Department Highway Info |
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Idaho Transportation Department Highway Info |
| US 12 | 1 mountain pass |
| I-15 | 2 mountain passes |
| US 20 | 2 mountain passes |
| ID 21 | 4 mountain passes |
| ID 28 | 1 mountain pass |
| ID 29 | 1 mountain pass |
| US 30 | 3 mountain passes |
| ID 31 | 1 mountain pass |
| ID 33 | 1 mountain pass |
| ID 36 | 1 mountain pass |
| ID 38 | 1 mountain pass |
| ID 55 | 1 mountain pass |
| ID 71 | 1 mountain pass |
| ID 75 | 1 mountain pass |
| I-84 | 1 mountain pass |
| ID 87 | 1 mountain pass |
| US 89 | 1 mountain pass |
| I-90 | 2 mountain passes |
| US 93 | 3 mountain passes |
| US 95 | 3 mountain passes |