The University #LeaveNoTrash Challenge is a week-long event during the second week of Earth Month, April 7th-13th, designed to raise awareness of Sustainable Development Goal Principle #3, Dispose of Waste Properly, by engaging the campus in a friendly, cross-university challenge to clean up our community. This is a student-centered spinoff of the existing month-long Leave No Trace #LeaveNoTrash campaign. The April 2024 competition will be between Colorado State University and the University of Notre Dame, with plans to add additional universities in future years. Prizes will be awarded to the winning university in a few categories (TBD).