Minnie was born to Allen and Kate Rae on Junary 17, 1888 in Balmorl, Manitoba. She came to Squamish with her parents in 1889. She worked as a practical nurse for Doctor N.V. Paul.
She married Herbert Armstrong in 1912. He and D. McCallum owned and operated a store in Squamish. He was also a part owner of the post office which used to be located where the Seven Seas Restaurant later stood.
Minnie and Herb had 6 children: Mabel (Mrs Keith), Gertrude (Mrs Wilson), Margareta (Mrs McLeod), Bob, Jim, and Les. They lived on the corner right of the Spiral Trailer Court in an area known as "Armstrong's Corner".
Herbert Armstrong fell off a roof and died in 1925. Minnie continued to live at "Armstrong's Corner" in the area across from Mamquam School on Government Road. In 1953, she built an "Armstrong Barn".
Minnie died at age 78 on January 5, 1966.