H. M. Bowker grew up in Libby, Montana, attended Carroll College in Helena, where she majored in English with a minor in sociology and education, and later went on to earn a master's degree in educational leadership from the University of Montana. For years, she taught English and art at the middle- and high-school levels, until serving a six-year stint as a secondary principal. In 1989, she completed her PhD in educational leadership at Gonzaga University and then served nine years as superintendent for Washington state public schools.
She currently lives near Seattle, Washington, with her husband and their three children.