SF-88, Military missile site museum in Marin Headlands, United States.

SF-88 is a former Nike missile launch site at Fort Barry in the Marin Headlands, north of San Francisco. Its underground magazine, elevators and launch rails were built to store and raise Nike Ajax and, from 1958, Nike Hercules missiles; volunteers have reconstructed five-ton missiles from recovered parts.

The facility opened in 1954 as part of the nation's defense against Soviet air attacks and operated for two decades. Its closure in 1974 reflected shifts in military strategy as technology and international tensions evolved.

This site reflects how Cold War defense shaped the region's development and what daily military operations looked like. Visitors can see the spaces where personnel worked and understand their role in the broader defense network.

Tours of the launch area run on the first Saturday of each month from 12:30 to 3:30 PM, departing every 45 minutes, and that day also brings Nike veterans for an open house. Other Saturdays are given over to volunteer restoration work, so the site is not open then. The fire control area SF-88C on Wolf Ridge is unrestored and reachable only on foot from Fort Cronkhite.

As part of SALT I, the United States and the Soviet Union could each keep one missile site for historical purposes, and SF-88 was chosen as the American site. The Army transferred the land to the National Park Service in 1974 as a "Historic Memorial to Air Defense – NIKE Hercules", with final transfer on February 12, 1976.