All visitors planning to overnight on any rock climbing routes in Yosemite National Park will be required to obtain an overnight wilderness climbing permit beginning on May 21, 2021. This pilot program is being implemented to better understand how park visitors use Yosemite’s big walls and to help improve climbing wilderness ethics and reduce negative human impacts associated with overnight big wall use. https://www.nps.gov/yose/learn/news/yosemite-national-park-to-implement-a-pilot-overnight-climbing-permit-system-beginning-on-friday-may-21-2021.htm