The Greystone campus is situated in and around the Greystone Cellars building, which William Bowers Bourn II conceived as a business concept. His father, William Bowers Bourn Sr., was wealthy from ownership of the Empire Mine gold mine, as well as co-ownership of a shipping company. Bourn II was a businessman with business interests and residences around California, although he had spent his summers during his youth at White Sulphur Springs Resort in St. Helena, before his parents bought Madroño, an estate in the town.