 Blossom Rock was discovered and named in 1826 by Captain Beechey of .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 hills above Oakland 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.