Usually the Beartooth Highway heading to Yellowstone's northeast entrance closes in mid-October. This is because the high-elevation road gets so much snow and is so remote that it is almost impossible to keep plowed and safe.
In 2015 however, the famous scenic road will be closed on October 5th. This time because of construction. The work will focus on a stretch of the road between the Wyoming-Montana border and Red Lodge, Montana.
The Beartooth Highway is the only way to get to Yellowstone's entrance towns of Silver Gate and Cooke City, other than driving through the park itself. In winter, the northeast entrance of Yellowstone kindly remains open so these town residents and their vacationer guests are not snowbound.
The Beartooth Highway is considered one of the most beautiful drives in the U.S. It was placed on the National Register of Historic Places in 2014.
Related: Winter Road Access in Yellowstone
More Information About the Beartooth Highway at beartoothhighway.com