Here is the cemetery in question:
https://www.wikitree.com/wiki/Category:Harmony_Grove_Cemetery%2C_Lockeford%2C_California
11455 Locke Road, Lockford CA
If you look at this area using Google Earth you can see what looks like a fence across the cemetery east of the church. That is, I believe, the dividing line between the Protestant Harmony Grove Cemetery and the Catholic San Joaquim Cemetery at 11495 Locke Road, Lockford CA