CalTran is working hard to open SR 120 or otherwise known as Tioga Pass May 2019.

Tioga Pass is a 13 mile stretch of highway that begins at the junction of US Hwy 395 and travels west to the east entrance gate of Yosemite National Park. Currently the pass is closed due to snow.
Every year Californians waiting to get to the Eastern Sierra destinations along Highway 395, like Mono Lake, Mammoth lakes and other lovely places. Likewise various visitors, including international visitors from Las Vegas, Death valley looking to visit  Yosemite National Park, eagerly await the opening of State Route 120, The Tioga Pass. The task is not a simple one as it accumulates 25-30 feet (about 8-10M) of snow and this year it kept on snowing with storm after storm. So it might me more.
Here is a video by Caltran showing how tough job it is. The clearing vehicles are all equipped with state of the art tools to keep them safe.
Currently SR 120 is closed but the SR 108, which runs parallel, to a bit north