Driving Roads / Going-to-the-Sun Road

This roughly 50-mile engineering marvel crosses the Continental Divide at Logan Pass in Glacier National Park, carved into sheer cliffs with glacier and valley views. It runs about 50 miles along Going-to-the-Sun Road in Montana. Drive time: about 1 h 50 min one way.
Best time to go: July to mid October. Lower sections open all year; the alpine section over Logan Pass usually opens fully by early July and typically stays open until the third Monday of October, weather permitting.

Sources: Length · High point · Best time. Drive time is the route time for the mapped route without stops, from Mapbox.
Record the full pass crossing and keep the time and distance in your drive log. A narrow alpine route where patience beats speed.
Seasonal, narrow and exposed with tight vehicle-size limits; drive slowly, use pullouts, and never stop in the roadway.
Open Road keeps every drive: the route on a map, the time and the distance. On iPhone and Android.