From 1958 to 1968, following the recommendations in the Hare Report, the Gault Nature Reserve was used for teaching and research by various departments of the University and also continued to be used by local residents and the general public.
In 1960, the mountain was designated a migratory bird sanctuary.
In 1970, McGill University commissioned the Audubon Society to conduct a detailed study of the mountain. The principal recommendations were to separate the Reserve into three separate management sectors to continue protecting the mountain from abuses associated with inappropriate use by people..
In 1972, Alice Johannsen, the director of what was then called the Gault Estate, founded the Mont St. Hilaire Nature Conservation Centre, a non-profit organization devoted to conservation and education.