Any high mountain passes through Montana/Idaho on I-90
Headed to South Dakota from Portland, OR along I-90, curious if there is any high mountain passes like on I-70 through Colorado?
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Fourth of July Pass, Lookout Pass, Homestake Pass, Bozeman Pass. Homestake and Lookout will be the biggest, not too much different than climbing I-70 out of Denver except for only 2 lanes each way. Bozeman Pass will basically be all downhill when heading east.
