Miscellaneous
Located west of the island is Blossom Rock, a treacherous submerged rock that lay only 5 feet below the surface of the water at low tide. Blossom Rock was discovered and named in 1826 by Captain Beechey of the HMS Blossom. Beechey noted that the rock could be avoided by aligning the northern tip of Yerba Buena Island with two especially large redwood trees growing in the East Bay hills as one entered the Bay. These redwoods were located in what is now Roberts Regional Recreation Area, near the "Madrone" picnic area; the area is marked with a historical marker. The "Navigation Trees" were logged in about 1851, exacerbating the danger of Blossom Rock. The top of the rock was blown up in 1870, and another section removed by blasting in the early 1930s.
In his book Two Years Before the Mast, published in 1840, Richard Henry Dana, Jr. mentioned the island and called it "Wood Island."
Read more about this topic: Yerba Buena Island