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I-90: Lookout Pass
4 miles east of the Mullan area
Steep Grade for 5 miles. Max grade is 6%.
Runaway truck ramps available for westbound traffic.
No fee for emergency use of runaway truck ramps.
I-90: Lookout Pass
Map of I-90: Lookout Pass
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Closure Closure Restriction Restriction Spring Breakup Spring Breakup Truck Ramp Truck Ramp