The Athletic Boosters support Marin Catholic athletes by promoting awareness, appreciation, and attendance for athletics, and also provide direct financial support to athletic programs and student-athletes. Examples of support include:
- ImPact concussion testing and parent education
- Refurbished athletic strength & weight room equipment
- Facility improvement for athletic facilities
- New uniforms for baseball, softball, and volleyball, new girls' basketball warm-ups, goal nets for soccer, field hockey and lacrosse, and scoring equipment for the gym
- New mascot uniforms for Willie and Wilma, the Wildcats
Athletic Boosters also support the annual Crab Feed event held at Marin Catholic. This event not only builds community but helps to support all athletic teams and safety programs and initiatives for all student-athletes.