https://www.mercurynews.com/2020/03/29/coronavirus-california-state-parks-close-access-to-vehicles-at-all-parks/

SACRAMENTO — After another day when residents flooded parks in seeming defiance of social-distancing recommendations, the state announced Sunday that it would close vehicle access at all 280 state parks in an attempt to thin the crowds.

Previously, the department had closed some of the most popular sites to parking and vehicular traffic after residents ordered to stay at home came to the parks in large numbers, defeating the purpose of the shelter-in-place in social-distancing orders Gov. Gavin Newsom has implemented to slow the spread of COVID-19.  The department had also temporarily closed all campgrounds, museums and visitor centers and canceled all events.