Some of the St. Mary's activities include: campus ministry, community service program, retreat program, Outdoor Venture Club, educational travel programs, student government, National Honor Society and Junior National Honor Society, National Junior Classical League, mock trial, MS and US brain bowl, literary magazine, after-school ski program, math team, choir, jazz band, orchestra, and drama programs.

If you would like to start a club, please contact Kacey Dewing at kDewing@smschool.us.