Yes. All facilities at the Presidio require visitors 12 and over to be fully vaccinated against COVID-19 and to have proof of vaccination.
UPDATED: As of February 16, 2022, the city of San Francisco has lifted the requirement for all people, regardless of vaccination status, to wear a mask indoors. Fully vaccinated individuals are no longer required to wear a mask in vaccination-required spaces. Proof of vaccination is still required to enter restaurants, bars, clubs, and gyms in the city of San Francisco. For more information about San Francisco's COVID-19 guidance, visit https://www.sfdph.org/dph/alerts/coronavirus-faq.asp
UPDATED: No. As of February 16, 2022, masks are no longer required for vaccinated individuals in indoor spaces. Proof of vaccination is still required for all event spaces at the Presidio. You are not required to wear a mask in the Presidio Chapel or the Golden Gate Club as it is a vaccination-required space; however, if you wish to wear a mask to protect yourself or others, we will have disposable masks available.