Thank you to Martha Graham for her tip about this site:
"The Early California Population Project (ECPP) provides public access to all the information contained in California's historic mission registers, records that are of unique and vital importance to the study of California, the American Southwest, and colonial America.
Within the baptism, marriage, and burial records of each of the California missions sits an extraordinary wealth of unique information on the Indians, soldiers, and settlers of Alta California from 1769 - 1850."
While the site is very data rich if you are researching early California ancestors, it is difficult to navigate. The site is free but does require registration. This cooperative project is made possible through major grants from:
The John Randolph Haynes and Dora Haynes Foundation