California State Historical Landmark #962
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This landmark is located in the Madrone Picnic Area, Thomas J. Roberts Recreation Area, Redwood Regional Park, 11500 Skyline Blvd, Oakland, California. There are 35 other California State Historical Landmarks in Alameda County. The GPS coordinates for this location are N 37° 48.650 W 122° 10.470.
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Until at least 1851, redwood trees on this site were used as landmarks to avoid striking the treacherous submerged Blossom Rock, in San Francisco Bay, west of Yerba Buena island. Although by 1855 the original stems had been logged, today's trees are sprouts from their stumps.