St. Mary's Preparatory is a four year secondary program of pre-college studies in a disciplined environment preparing young men for future study and careers of service. The Prep has a day student and boarding school program. St. Mary's is accredited by the State of Michigan Board of Education, the Archdiocese of Detroit, and MNSAA/MANS. Almost 100% of our graduates attend college. "If the Orchard Lake Schools did not exist, it would be necessary to establish them." -- Pope John Paul II

Upcoming Events

  • Meet the Teacher Night
    Monday, Aug 29, 2016
    6 p.m. @ Cafeteria
  • Auction Kickoff Party
    Saturday, Sept. 10
    , 2016
    7:00 p.m.-11:00 p.m. @ S.M.A.C.
  • Homecoming
    Friday, Sept. 16, 2016
    Homecoming OLSM vs. U of D - 7:00 Kick off
  • Homecoming Dance
    Saturday, Sept. 17, 2016
    7-10 pm @ Dombrowski Fieldhouse


  • School Picture
    Tuesday, Aug 30, 2016

    10th grade pic, during Theo classes 

  • School Picture
    Wednesday, Aug 31, 2016
    9th grade pic, during Gym classes