The starting location is Mountview Cemetery, with the actual geocache located in the older part, originally called Billings Cemetery which dates back to the1880's, in Billings, Montana; Combined in the late 1920s they make the areas largest and oldest resting place for many of the founding families of Billings, such as O'Donnell's, Moss's, and for possibly the daughter of Calamity Jane and Wild Bill Hickcock named Jean McCormick.
https://www.findagrave.com/memorial/81881169/jean_h-mccormick