Main Post in San Francisco City and County, California — The American West (Pacific Coastal)
Outpost of an Empire
Golden Gate National Recreation Area
| | Presidio of San Francisco | |
The Spanish garrison here protected Spanish land and regulated ship traffic into the bay until Mexico took control of this territory in 1822. Duty was never easy. Unreliable supply lines left the soldiers constantly wanting. Rain eroded and earthquakes fractured the adobe walls. When the Americans occupied the post in 1846, they found a dilapidated post "crumbling for want of care."
Captions
Larger image: An artist's conception of the Spanish Presidio as it likely appeared about 1800. The post was 100 yards square, "with divisions for church, royal offices, warehouses, guardhouse, and houses for soldier settlers."
Smaller image: In 1993, archaeologists discovered the foundations of the Spanish Presidio. The foundations were five feet wide and could have supported adobe walls up to twelve feet high.
Erected by National Park Service.
Topics. This historical marker is listed in these topic lists: Anthropology & Archaeology • Forts and Castles • Military. A significant historical year for this entry is 1776.
Location. 37° 47.913′ N, 122° 27.515′ W. Marker is in San Francisco, California, in San Francisco City and County. It is in Main Post. It is on Graham Street south of Sheridan Avenue, on the right when traveling south. Touch for map. Marker is in this post office area: San Francisco CA 94129, United States of America. Touch for directions.
Regionally, this marker is on California’s Coast Ranges. It is also on the American Pacific Coast. Globally, it is in North America, on the Ring of Fire, in the Pacific Rim, in the Western Hemisphere, in the Western World, and in the Anglosphere. Historically, it finds itself in what was once New Spain and also Mexicos Alta California.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Pershing Square (here, next to this marker); North West Corner of Original Presidio (a few steps from this marker); Site of General Pershings Quarters (within shouting distance of this marker); Old Stone Powder Magazine (within shouting distance of this marker); Ammunition Magazine (within shouting distance of this marker); Establishment of the Presidio of San Francisco (about 300 feet away, measured in a direct line); Oldest Adobe Building in San Francisco (about 400 feet away); Old Post Chapel (about 400 feet away). Touch for a list and map of all markers in San Francisco.
Credits. This page was last revised on September 25, 2025. It was originally submitted on July 6, 2021, by Duane and Tracy Marsteller of Murfreesboro, Tennessee. This page has been viewed 304 times since then and 21 times this year. Last updated on September 20, 2025, by Douglass Halvorsen of Klamath Falls, Oregon. Photos: 1. submitted on September 20, 2025, by Douglass Halvorsen of Klamath Falls, Oregon. 2, 3. submitted on July 6, 2021, by Duane and Tracy Marsteller of Murfreesboro, Tennessee. • J. Makali Bruton was the editor who published this page.


