Heavy fog in marshy country is often called tule fog . The lighthouses in California were first developed after the gold rush brought great numbers of ships to California. Between 1852 and 1854, seven structures were built in California with congressional funds. They were located at Alcatraz and Fort Point in San Francisco Bay, on the Farallon Islands , at Point Pinos , in the harbor of Humboldt Bay, at Point Concepcion , and Point Loma in San Diego County. They were once administered by the U.S. Lighthouse Service but later came under the jurisdiction of the Coast Guard.
Modern stations have radio beacons as well as lights and foghorns.
In 1970 there were 24 stations stretching from St. George Reef, north of Crescent City to Point Loma, south of San Diego. To find out more about California lighthouses, here is a web site you might like to visit. If you would like to find a bulletin board about lighthouses these fine folks in Michigan have one. Click Here . This pass through the Tehachapi Mountains into Grapevine Canyon in Kern County and north into San Joaquin Valley was long guarded by Fort Tejon .