St. Mary's School offers a variety of extra-curricular activities in the arts and athletics fields.  Bell ringers and All-County Chorus are available in addition to regular music class.  Piano, guitar, string and band lessons are offered with private instructors.  Recorder lessons are given to 2nd graders as an introduction to band.

   Students have the opportunity to participate in the National Geographic Geography Bee, Reader's Digest Vocabulary Challenge, Monroe County Catholic Spelling Bee and E3 Science Competition.

  Soccer, basketball, bowling, golf, and ski & snowboard clubs are offered as well as drama and chess club.