Sears Rock (sometimes Sear's Rock) is a small sub-surface rock about west of

Rodeo Beach Rodeo Beach ( ) is a beach in the Golden Gate National Recreation Area located in Marin County, California, United States, two miles north of the Golden Gate Bridge. It is characterized by a spit of around 50 meters width at the mouth of a long ...

in the Pacific Ocean off

Marin County Marin County is a county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 census, the population was 262,231. Its county seat and largest city is San Rafael. Marin County is acros ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

.USGS
/ref> It is the highest point of the larger Centissima Reef, a sub-surface navigation hazard east of the

Bonita Channel The Bonita Channel is a shipping channel which leads northbound traffic out of the Golden Gate to the Gulf of the Farallones and Pacific Ocean. References

Geography of Marin County, California Geography of the San Francisco Bay Area Trans ...

, although some reports refer to the two as separate features. A 1908 report on

San Francisco Bay San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, and Oakland. San Francisco Bay drains water from a ...

stated that a survey was then in progress to investigate the cost of removing both Sears Rock and Centissima Reef, along with Mission Bay Rock and Sonoma Rock, near Mission Rock in San Francisco Bay. In 1922, Representative

Julius Kahn Julius Kahn may refer to: *Julius Kahn (inventor) (1874–1942), engineer of reinforced concrete *Julius Kahn (congressman) Julius Kahn (February 28, 1861 – December 18, 1924) was a United States Congressman who was succeeded by his wife ...

told a congressional committee that neither Sears Rock nor Centissima posed a navigation hazard as they had been blasted several years previously: "They are not visible, neither of them. The Sear's was blasted to a depth of 40 feet some five or six years ago. It is never visible at all. There are some people who think that it ought to be blasted to a depth of 45 feet, but the men who navigate the vessels think 40 feet for the present time a sufficient depth."

References

See also