← Montana cannabis laws›Public Cannabis Use

Montana Public Cannabis Use (2026)

Restricted: Using cannabis in public is prohibited in Montana, and smoking in public carries a civil fine of up to $50.

RestrictedVerified Oct 14, 2026

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Official source: revenuefiles.mt.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Public Cannabis Use in states bordering Montana

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

IdahoRestricted
Cannabis use is illegal in Idaho — there is no legal cannabis consumption, public or private. Possession of 3 ounces or less is a misdemeanor carrying a mandatory minimum $300 fine for adults 18 and older, plus up to a year in jail; more than 3 ounces is a felony punishable by up to 5 years and a $10,000 fine (Idaho Code § 37-2732(c), (e)).
Verified Jul 27, 2026 · Source: legislature.idaho.gov · Full Idaho rule →
North DakotaConditional
Using cannabis in public is not allowed in North Dakota, and medical use is limited to private settings.
Verified May 31, 2026 · Source: hhs.nd.gov · Full North Dakota rule →
South DakotaConditional
Using cannabis in public is not allowed in South Dakota — medical use is restricted to private settings and is barred in public, in vehicles, and on school grounds.
Verified May 31, 2026 · Source: sdlegislature.gov · Full South Dakota rule →
WyomingRestricted
Cannabis use in public is not allowed in Wyoming — all cannabis use is illegal.
Verified Aug 2, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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