Stay up to date on road closures!
All road statuses are available through the National Park Service (another reason to download the app!). Several of the roads are seasonal and others are intermittently closed for weather. For example, Moose-Wilson Rd and Dunraven pass are only open from May-Oct/Nov. Each park entrance will open at different times of the year as well.
Go check out my guide for the best free things to do as well as itineraries and travel tips to make your trip unforgettable.