About 3 million people a year. I think the best time to visit is the middle of September
Usually the go to the sun road doesn't get opened until early July each year.
If you go in early June like Nancy says check the road conditions to make sure they have finished plowing. If they aren't done you won't be able to get from one side to the other and you can't get to Logan Pass. This year there is a lot of snow so check before you go.
What Nancy said.....
3 million and the best time in my opinion to visit is in early June
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