The East Entrance to Yellowstone National Park opens to automobiles at 8 a.m. on Friday.
But the park warns that visitors should allow extra travel time if traveling to the Old Faithful area from the east side of the park. Many roads in the park are still closed because of snow.
The road from the park's North and West Entrances to Madison, Canyon and Old Faithful opened back on April 15.
But roads from Lake south to West Thumb, Grant Village and the South Entrance aren't scheduled to open until May 13.
And Craig Pass, which connects the east side of the Grand Loop Road to Old Faithful, remains closed until at least May 13 due to heavy snowfall.