The Business of Cannabis

Marijuana Not Allowed On Campus, University Of Michigan Warns Ahead Of Hash Bash

Mar 18, 2026 | Feature, Great Lakes Region, Michigan

The University of Michigan is allowing the annual Ann Arbor Hash Bash to take place once again on the Central Campus Diag on Saturday, April 4.

But marijuana isn’t allowed, the University of Michigan Police Department is warning ahead of the event.

While marijuana is legal under Michigan state law for people 21 and older, it remains a federally controlled substance and may not be used or possessed anywhere on UM property, including university buildings and outdoor spaces governed by university policy, UM Deputy Police Chief Melissa Overton said in a statement Wednesday, March 18.

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