Trinity School sponsors an athletics program designed to encourage teamwork, promote the development of healthy bodies and foster the growth of personal character. Much like the classroom, the athletic arena provides opportunities to learn. Fair play, healthy competition, honorable victory, gracious defeat and respect for opponents are a few of the lessons learned. River Ridge students in the ninth through twelfth grades participate as members of the Minnesota Christian Athletic Conference (MCAA) and the Minnesota State High School League (MSHSL). Students in the seventh and eighth grades participate in the St. Paul Catholic Athletic Association (CAA).