• Rainbow over Half Dome


    National Park California

Tioga and Glacier Point Roads Plowing Update

Three pictures of plowing through several feet of snow.

Tioga Road plowing between Tuolumne Meadows and Tioga Pass, April 22, 2014.

Winter opening begins on or around April 15, 2015.

Tioga Road

The Tioga Road opened at noon on Friday, May 2, 2014.

Glacier Point Road

The Glacier Point Road opened to vehicles on April 14, 2014.

(View a list of road opening dates from previous years.)

Factors Affecting Plowing Operations

The following factors affect when the Tioga Road opens:

  • Avalanche zones (26 potential areas). The Olmsted Point avalanche zone requires careful work, including application of charcoal over the snow to help with melting and blasting the snow slab to make it safer for personnel.
  • Heavy snow pack slows the whole operation.
  • Trees that have fallen across the road and been buried in the snow can cause substantial damage to equipment and result in a stop to all operations until they're cleared.
  • Rockfalls buried by the snow can cause substantial damage to the equipment and result in a stop to all operations.
  • Snow storms during the opening require a stop to Tioga Road operations in order to plow and sand park roads that are open.
  • Road repairs, ditching, and brushing operations must occur once snow has melted back enough.


Did You Know?