And make sure to take the time to drive all the way from both wear to east gate to see St. Mary Lake!
You can enter anytime. If you haven't paid yet there are drop boxes at each entrance
No close time
You can enter the park 24/7. The visitor center opens at 8am but many of the parking areas on Going-to-the-Sun road (Avalanche Creek and Logan's Pass for sure) will fill up early - sometimes before 8am! Shuttle service begins on July 1st so you can park at Apgar Visitor Center and ride the shuttle to various destinations on Going-to-the-Sun Road
The earlier the better
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