Sister Mary Glenn was born in Port Angeles, WA, and began religious life in 1965 at the Visitation Monastery in Federal Way, WA. In 1971 she moved to western Colorado to begin a new monastery. In 1978 she and another sister became an independent religious community under the Bishop of Pueblo. They lived a simple lifestyle and offered retreats and hospitality to local groups.
In 2009 Sister Mary joined Benet Hill Monastery and continues to live in Whitewater as a mission of Benet Hill. She enjoys working on the property at Kannah Creek cutting wood and making fires in the wood stove, and offering spiritual direction to their guests.