Summary edit

DescriptionUS Navy Captain Cadwalader Ringgold and Landmark Tree Information Display by East Bay Regional park for California Historical Landmark 962.jpg	English: Site of Blossom Rock Navigation Trees This is a photo of a place or building that is listed on the California Historical Landmark listing in the United States. Its reference number is 962.
Date	Taken on 10 September 2016, 15:26:11
Source	Own work
Author	Jesper Jurcenoks

Camera location	37° 48′ 40.35″ N, 122° 10′ 28.87″ W	View this and other nearby images on: OpenStreetMap	37.811208; -122.174686

Display Reads:

The Landmark Trees

In the early years of navigation on San Francisco Bay, a major hazard, "Blossom Rock" lay submerged between Yerba Buena and Alcatraz Islands. Following an 1827-1828 tour of the Pacific Ocean, a British sea captain. F.W. Beechy, recorded the presence of the rock, and described the sight lines necessary to locate it. "After passing the fort, a ship may work up for anchorage without apprehension... The only hidden danger is a rock with one fathom on it a low water...between Alcatraz and Yerba Buena Islands; it has seven fathoms alongside it, the lead therefore gives no warning. The marks when on it are the north end of Yerba Buena Island and are with two trees (nearly the last of the straggling ones) south of Palos Colorados, a wood of pines situated on the top of the hill, over San Antonio, too conspicuous to be overlooked..."

The towering redwood trees that helper nineteenth century sea captains steer clear of Blossom Rock are gone now, but visitors to Robert's Regional Recreation Area can picnic among their descendants in a beautiful grove of second-growth redwoods.

In 1851. U.S. Navi Captain Cadwalader Ringgold published this map of San Francisco Bay.

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