I checked the 1880 and 1900 censuses on Ancestry.com and found the following:

1880, Forest Township, Sierra Co., CA [ED 96, SD 3, p.21, Fam 243]

Harris, Abraham 48 b. abt 1832, PA Farmer
Harris, Catherine 33 b. 1847 Wisc.
Harris, Cromo[?] 18 Son CA
Harris, Lena 16 Dau. CA
Harris, Iney 14 Dau. CA
Harris, Lilley 12 Dau. CA
Harris, Elza 10 Dau. CA
Harris, Rosa 7 Dau. CA
Harris, John 5 Son CA
Harris, Flora 2 Dau CA
[adult miner from Germany]
Harris, Abraham 6/12 Son CA

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1900 census, Santa Clara Township, Santa Clara Co., CA [ED 77, SD 2, Sheet 12-B, Line 88]

Harris, Catherine b. Dec 1844 55 Wisc. Md or Wd*
[mother of 9 children; 8 living]
Harris, Lola[?] M. Dau. 22 CA School teacher
Harris, Abe G. Son 20 CA

*This is either Md (married) or Wd (widowed). Divorced and separated women sometimes reported being widowed.

Santa Clara is in the Bay Area of California, not far from San Francisco.

Hope this help.

Chuck Knuthson
Sierra Co. GenWeb