The Main Post--the heart of the Presidio--marks the site of a Spanish garrison established here in 1776. This historic site served as a Spanish military base for forty-five years, fell under Mexican control for twenty-five years and--starting in 1846--was an important U.S. Army post for over 140 years. The Presidio's oldest existing buildings are found on the Main Post.
Did You Know?
Crissy Field was the only Army airfield in the western United States continuously active from 1919 to 1936.