The Discovery Of Alcatraz Island
The early use of Alcatraz by these indigenous peoples is difficult to reconstruct because most oral histories of the tribes were lost. Historians believe that Alcatraz was used as a place for camping and an area for collecting food, especially eggs of birds and marine life. One tradition may have been that the Island was used as a place of exile for members of the tribe who had violated tribal law.
When the first Spanish explorers arrived in 1769, more than 10,000 indigenous people were living around San Francisco Bay.