Public-space consumption is illegal statewide
MCL 333.27954 prohibits cannabis consumption in any public place in Michigan. That includes state parks (Belle Isle, Algonac State Park, Lakeport State Park, Sleeping Bear Dunes, Tahquamenon Falls — all of them), city parks, public beaches, sidewalks, hiking trails, campsites in public campgrounds, and lakefronts. Michigan DNR rangers, state police, and local police all enforce. Consume only in private residences where the owner permits.
Possession on public land is permitted
Adults 21+ can carry up to 2.5 ounces of flower (or 15 grams of concentrate) on public land in Michigan, even where consumption is prohibited. That distinction matters: you can bring cannabis to a state park or beach, you just can't consume it there. Keep it in original sealed packaging, store it where it isn't accessible to a driver, and consume only when you're back on private property.
Private cabins and campsites
Privately owned cabins, rented campers, and private campsites change the rules. If you're renting a cabin from a private owner, cannabis use is governed by the owner's policy, not state public-space law. Confirm with the property owner before consuming. Public Michigan state campgrounds are public land and prohibit consumption regardless of how rural the site feels.
Boating, fishing, and Lake Huron
Possession on a watercraft is permitted for adults 21+. Operating a vessel while impaired is illegal under MCL 324.80176 (Michigan boating-under-the-influence statute). Passengers cannot consume on commercial passenger boats. Private boats on private water (a leased dock or private lake property) follow the property owner's rules, not state public-space law.
The Blue Water Bridge to Canada
U.S. federal law classifies cannabis as a Schedule I controlled substance. Canadian customs separately restricts cross-border cannabis transport. The Blue Water Bridge crossing from Port Huron to Sarnia enforces federal law on the U.S. side. Do not attempt to cross with cannabis in any form, regardless of how legal it was on your side. Buy on the Michigan side, consume in Michigan, leave it in Michigan.
- MCL 333.27954 — Restrictions on consumption in public places — Michigan Legislature
- MCL 324.80176 — Marine Safety: Operating a Vessel While Intoxicated — Michigan Legislature
- U.S. Customs and Border Protection — Cannabis at international borders — U.S. Customs and Border Protection
