Looks like Yosemite is reopening on or around June 11:
https://www.mercurynews.com/2020/06/03/yosemite-national-park-settles-on-reopening-date/Until then, you can legally attend a mass protest in a major metropolitan area (masks not required) if you don't loot or violate curfew, but hiking Mt. Lyell is prohibited.
