Actually, it never belonged to the Catholic Church, and was only occasionally used for public services. Here's some history that I posted on pinecam last year:
I ran across some additional information on this place while doing some other research. The history of the place is discussed in an article from the July 10, 1930 edition of the Denver Catholic Register. Charles McPhee was a lumber baron from Denver whose son, William, inherited the business and eventually operated McPhee & McGinnity lumberyards in 14 states. William also donated the land for Camp St. Malo, near Allenspark. The "Mesdames of the Sacred Heart" are a teaching order of nuns based in France who operated academies for women in New York and St. Louis.