For the past two years, CU-Boulder has closed the campus to non-affiliates on April 20. We have taken these steps to ensure that our research, creative work, teaching, studying, residential and student support services, and official business – which occurs on the campus seven days a week – are not compromised by the unwanted 4/20 gathering. For a third straight year, I am announcing that the campus will be closed to non-affiliates on April 20.