April 16 The California Department of Transportation (Caltrans) opened Monitor Pass (Hwy 89) over the Sierra Nevada, with the focus now moving to Ebbetts Pass (Hwy 4) and Sonora Pass (Hwy 108). Monitor Pass offers another way to Hwy 395 on the East Side, opening up access to Sierra spring skiing at Mammoth Mountain and in the backcountry. Caltrans traditionally plans to open Sonora and Ebbetts Passes by Memorial Day weekend, but with lower snow during the 2020-2021 winter, and the April 24th stream fishing opener, they hope to open both of them earlier.
In Yosemite: Plows have reached Tioga Pass. Plowing of side roads, turnouts, parking lots, etc., are in progress. Additional work, including road repairs, removal of trees that may fall onto the road, utility system repair, etc., must all occur prior to road opening. There is no estimated opening date for Tioga Road.
For Sonora Pass, the California Department of Transportation (Caltrans) has removed snow, cleared debris and made necessary repairs to open State Route 108/ Sonora Pass to Kennedy Meadows at 10:00 a.m. on Monday, April 19, 2021.
There is no ETO for the full opening of Sonora Pass/SR-108.