Schedule I · possession unlawful
Montana lists psilocybin and psilocin in Schedule I. Unauthorized possession remains unlawful under §45-9-102.
MT legal and access quick reference
Reviewed on September 29, 2026 by iMD teamPsilocybin law and access in Montana
A concise, source-dated explanation of statewide law, regulated access, and the difference between state and local policy.
Laws and implementation can change quickly. This page is educational information, not legal advice.
No enacted public access program
Montana has no enacted personal-use, retail, dispensary, or supervised-service program for psilocybin.
2026 experimental-treatment framework implemented
Montana implemented licensing rules for Experimental Treatment Centers in July 2026. The framework can support qualifying experimental treatments, but it is not a general public psilocybin-services program.
2026 Montana experimental-treatment update
Montana expanded its infrastructure for experimental medical treatment in 2026. Senate Bill 535, enacted in 2025, created Experimental Treatment Centers as a licensed health-care-facility category, and the Department of Public Health and Human Services adopted implementing rules effective July 25, 2026.
The state now publishes applications and licensing information for Experimental Treatment Centers. During rulemaking, DPHHS also addressed comments concerning psychedelic-assisted therapies and facilitators licensed for psilocybin services in other states. This framework may support qualifying experimental-treatment pathways, but it does not create general personal-use, retail, or statewide supervised psilocybin access.
What local policy means
For Billings, Bozeman and Missoula, this Montana page is the appropriate quick-reference starting point because no separate municipal action was retained as a distinct local-policy guide. Local rules can change, so verify current official records.
Cities covered by the Montana guide
The statewide explanation above covers Billings, Bozeman and Missoula. A separate page appears below only where a documented municipal action adds material local context.
BillingsCovered in Montana guide
BozemanCovered in Montana guide
MissoulaCovered in Montana guide
Sources used for this review
This page was checked against the controlling state statutes, enacted laws, agency records, and official bill histories listed below.
Common questions
Is psilocybin legal in Montana?
No. Psilocybin and psilocin remain Schedule I substances, and unauthorized possession remains unlawful.
Does Montana have a regulated psilocybin access program?
No. Montana has no enacted personal-use, retail, dispensary, or supervised-service program for psilocybin.
Do city policies change Montana law?
No. A local enforcement-priority policy may affect municipal enforcement, but it does not legalize commercial sale, create statewide legality, or override federal law.
What changed in Montana in 2026?
Montana DPHHS implemented licensing rules for Experimental Treatment Centers, effective July 25, 2026. The framework creates a regulated facility pathway for qualifying experimental treatments, but it does not establish general public psilocybin access.
Continue at the right depth
The product-site link provides product-format and business-policy information. It does not change the law described on this page or establish legal access in any jurisdiction.