Due to the huge increases in COVID19 cases, most of the parks in California are now closed, or limited to day use only. This includes Yosemite, Death Valley, California State Parks, etc. Here's the note from Yosemite
Coronavirus, the virus responsible for the disease COVID-19, has caused a public health emergency as declared by Mariposa County, the State of California, and the United States Government. In consultation with local, county, and state public health officials and guidance provided by the United States Centers for Disease Control and Prevention (CDC), and in order to maintain public health and safety while allowing management and administrative operations to continue, the Superintendent is designating the entirety of Yosemite National Park as open for day use only during the hours specified in this order, and closed to all overnight use by non-residents of Yosemite National Park. For all who are present within the park at any time, certain public use limits or restrictions (community containment measures) are warranted to reduce the risk of exposure and transmission of COVID-19 at the individual and population level by limiting social interactions and preventing inadvertent exposures.
The situation is critical in many local counties. Tuolumne County is reporting NO available ICU beds in the hospital, and the same is true of other areas near Yosemite. Stay home, stay safe, and make plans for when this mess is finally in our collective rear view mirror!