Morro Bay in San Luis Obispo County, California — The American West (Pacific Coastal)
A Bridge to the Sandspit
Look across the bay. Can you see the tiny remnants of a wooden trestle bridge that once connected the place where you are standing to the sandspit?
The Navy built the bridge in 1942 as part of its efforts to create a functional Navy base in Morro Bay harbor. The harbor was rebuilt as a Navy Section Base to support small deepwater "mosquito" patrol boats, with a safer entrance, better docks, and a more usable staging area.
Exactly why the Navy built the bridge is a mystery.
The trestle bridge was a handy asset when the Section Base was converted to an Amphibious Training Base in early 1944. It allowed soldiers and small vehicles to cross easily to the sandspit for training, and was used by the Coast Guard for nighttime beach patrols.
Photographs show that the bridge was originally a sturdy flat surface, but was too low to allow boats into the south bay. Probably within a year, the U.S. Army Corps of Engineers modified the bridge to allow small boats - possibly landing craft - to pass under.
The Navy permitted civilians to use the bridge beginning in 1943. Local residents recall crossing the bridge in a pickup after the war ended to go clamming - the pickup allowed them to carry more clams.
After the war, the new safer harbor built by the military attracted commercial fishing boats in large numbers. These bigger boats could not pass under the trestle bridge, so it was taken down to allow access to the southern portion of the Embarcadero.
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Explore the Hidden History of Morro Bay
The Hidden History Project tells stories of Morro Bay's past, often revealing truths that are right in front of your eyes if we only knew what to look for.
Discover additional interpretive panels with descriptive Hidden History stories of Morro Bay at various locations throughout the city.
Erected by Historical Society of Morro Bay and Morro Bay In Bloom.
Topics. This historical marker is listed in these topic lists: Bridges & Viaducts • War, World II. A significant historical year for this entry is 1942.
Location. 35° 22.021′ N, 120° 51.247′ W. Marker is in Morro Bay, California, in San Luis Obispo County. It can be reached from Embarcadero north of Harbor Street. Marker (along with several others) is located along a boardwalk pathway behind restaurants and tail businesses. Touch for map. Marker is at or near this postal address: 913 Embarcadero, Morro Bay CA 93442, United States of America. Touch for directions.
Regionally, this marker is on Central Coast and specifically on the 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: The Abalone of Morro Bay (within shouting distance of this marker); Fishermen Lost at Sea Memorial (within shouting distance of this marker); Change On The Embarcadero: The Machine Shop (within shouting distance of this marker); A Working Waterfront: The Boatyard (about 300 feet away, measured in a direct line); A Deep Dive into Morro Bay's History (about 400 feet away); Morro Bay Women in Fishing (about 400 feet away); Oyster Farming in Morro Bay (about 400 feet away); A Royal Game (about 500 feet away). Touch for a list and map of all markers in Morro Bay.
Also see . . .
1. Historical Society of Morro Bay. (Submitted on May 16, 2026, by Jason Voigt of Glen Carbon, Illinois.)
2. Morro Bay In Bloom. (Submitted on May 16, 2026, by Jason Voigt of Glen Carbon, Illinois.)
Credits. This page was last revised on June 1, 2026. It was originally submitted on May 16, 2026, by Jason Voigt of Glen Carbon, Illinois. This page has been viewed 17 times since then. Photos: 1, 2. submitted on May 16, 2026, by Jason Voigt of Glen Carbon, Illinois.

