When Mary Heron was born on 10 November 1804, in Toronto, Ontario, Canada, her father, Richard Heron, was 33 and her mother, Harriet Hill DUE, was 19. She married John Snider Sr on 28 February 1822, in Toronto, York, Upper Canada, British Colonial America. They were the parents of at least 3 sons and 2 daughters. She died on 31 January 1852, in Salt Lake City, Salt Lake, Utah, United States, at the age of 47, and was buried in Salt Lake City Cemetery, Salt Lake City, Salt Lake, Utah, United States.