Beartooth Pass, just outside the northeast entrance, virtually never opens before July (sometimes not until mid-July); East Entrance Rd. often opens sometime in June, and usually has construction (some heavy-duty landslide zones along that road), and Dunraven Pass (between Canyon & Tower) is late to open as well. The others are virtually always open by sometime in May, in time for the main tourist season to start.
The plowing videos are sure impressive!
2020 Toyota Tundra CrewMax 5.7L V8 w/ tow pkg, Equal-i-zer
2020 Lance 2375