Hillside Cemetery has over 3,300 document burials. At least 2,000 of those have no identifiable markers. About 150 residents died in the flu epidemic in October 1918. Many were buried in mass graves. Two other major causes of death recorded are snowslides and mine accidents. A comprehensive record of the burials in Hillside cemetery has been compiled into a two volume book, The Story of Hillside Cemetery, by Freda Carley Peterson. Copies of those books and other information about the cemetery can be found at http://www.silvertonhillside.com.