Lake City Cemetery, Lake City, Calhoun County, Iowa is a cemetery I haven't visited yet. According to my notes, Mason Ross might be buried here as well as his wife Daisy (Barham) Ross. I don't have too many other details, but looking at the map, it seems like a very large cemetery. If I have decent weather, I should stop and visit it sometime on the way through Calhoun County.
Update: I added a photo of the main entrance and I was able to locate the Hipple group and Mason and Daisy Ross.
Find a grave lists the following Ross names. They don't appear to be direct relation, but if I see the tombstones, I will take a photo.
Ross, Eva L. (1876 - 1892)
Ross, Lela I. (1824 - 1900)
Ross, Margaret (1877 - 1932)
Ross, Robert R. (1881 - 1911)
Ross, Rolla G. (1880 - 1903)
Ross, Sarah (1852 - 1922)
Ross, Susan (1810 - 1890)
Hipple, Isaac John, Company H, 29 Ind. Inf. (Indiana Infantry)
Hipple, Sarah E. (1849 - 1914)
Isaac and Sarah Hipple were the parent-in-laws of George A. Ross.
Mason Ross (1892 - 1980)
Daisy (Barham) Ross (1891 - 1972)
Eleanor Ross (1926 - 1927)