From Shepherd Canyon extending toward the southeast the Bayside hills were covered in a vast redwood forest known as the San Antonio Redwoods . Two especially tall trees ( the Navigation or Blossom Rock trees ) were used by sailors as a navigation aid to avoid Blossom Rock near Yerba Buena Island . Around 1847 settlers started logging the San Antonio redwood forest . In 1850 the area 's first steam sawmill was built on the edge of Montclair at Palo Seco Creek in the head of Dimond Canyon . A logging road to the mill was built high along the northern side of Dimond Canyon which later became Park Boulevard . This logging road connected to a wharf at the foot of 13th Avenue and was used to transport the logs down Dimond Canyon to the Bay . By 1860 the San Antonio forest was logged completely . A second logging occurred after the 1906 San Francisco earthquake . In this instance the second growth redwoods ( approximately 50 years old ) as well as the stumps from the first generation trees were logged . One of the largest redwood stumps ever found ( 32 ' in diameter ) is in the Oakland hills and only a single old growth redwood ( the Grandfather ) remains . Current third growth redwoods are protected in parks including Redwood Regional Park , Joaquin Miller Park and Roberts Regional Recreation Area and redwoods of various ages are found in many Montclair neighborhoods
1906 San Francisco earthquake
1906 San Francisco earthquake
Montclair, Oakland, California