Is Weed Legal in Montana? Visitors, Glacier Park and Red Counties
Adults 21+ can buy at licensed shops, but national parks, the Canadian border and roughly half the counties change the answer.
This guide is about the United States — not the country you picked in the header.
Key takeaways
- Adults 21+ with a valid ID can buy 1 oz, 8 g of concentrate or 800 mg of edibles per transaction at licensed dispensaries.
- Some counties never opted in to recreational sales, so shops exist only in "green" counties.
- Glacier, Yellowstone, national forests and BLM land are federal: no possession or use.
- Public use is a civil fine up to $50; the state tax is 20% on adult-use sales.
Lock the door of a rental in Whitefish and the cannabis inside is legal. Drive 30 miles east and cross into Glacier National Park with the same bag, and it is a federal problem.
What a visitor may buy and carry
Adults 21 and older from other states and countries may buy, and dispensaries ask for valid ID such as a driver's license or passport, according to the regional tourism office for Glacier Country. Montana's Department of Revenue sets the same amounts for everyone: up to one ounce of usable marijuana, including 8 grams of concentrate or 800 milligrams of THC-infused products.
- Legal age
- 21+
- Per transaction
- 1 oz flower, 8 g concentrate, 800 mg THC in infused products
- Adult-use tax
- 20% state tax, plus up to 3% county tax
- Public use
- Civil fine of up to $50
- Driving
- Driving impaired is illegal; a 5 ng/mL blood THC limit is widely reported
- Sales since
- January 1, 2022
Where the answer changes
| Place | Cannabis allowed? | Why |
|---|---|---|
| Private home, with the owner's consent | Yes | State law allows use on private property |
| A public street, park or restaurant patio | No, $50 civil fine possible | MCA 16-12-106: smoking in a public place |
| Glacier and Yellowstone national parks, national forests, BLM land | No | Federal land, where federal law applies |
| A "red" county that rejected I-190 in 2020 | No recreational sales | Sales allowed only after local voters opt in; SB 11 (2025) eased the local ballot process |
| Indian reservations | Follow tribal law | Reservations set their own rules; the state's compact bill, HB 952, was vetoed in 2025 |
| Canada, Idaho, Wyoming, North Dakota, South Dakota | No | Crossing a border with cannabis is a federal offense in the U.S. and a crime in Canada, and Idaho, Wyoming and the Dakotas have no adult-use sales |
If your trip covers both a park and a town, plan a place to leave what you buy; a hotel that allows use is rare. The driving comparison shows how Montana's THC limit compares with other jurisdictions, and the border crossing guide covers the Canadian side.
How Montana got here
Voters approve Initiative 190, which legalizes adult possession and sets up a licensed market.
The Legislature passes HB 701 to put I-190 into working rules, including the county opt-in structure.
Licensed dispensaries begin adult-use sales.
SB 27 freezes new licenses; SB 74 changes the tax base; HB 636 and HB 792 set edible and label rules for July 2026.
The Department of Revenue may begin accepting applications for new businesses and premises again.
Home grow and locked storage
For residents and hosts: an adult may grow up to two mature plants and two seedlings, and a residence is capped at twice that number, or four mature plants and four seedlings. Registered cardholders may keep four and four. Plants and anything they produce beyond one ounce must be in a locked space, out of view from a public place, and the grower must own the property or hold the owner's written permission.
The tax, and what sales look like
$134.1M
total dispensary sales, Jan to May 2026 ($129.9M in 2025)
Montana DOR via Marijuana Herald
$1.408B
sales since January 2022
Montana DOR via Marijuana Herald
$241.2M
marijuana tax collected since 2022
Montana DOR via Marijuana Herald
Before you shop
- Confirm the county — a shop in a red county cannot sell recreational cannabis; the Department of Revenue lists licensed premises
- Read the label — new warning statements and addiction-resource links became mandatory on July 1, 2026 under HB 792
- Expect smaller edible doses — infused products are capped at 5 mg per serving and 100 mg per package since July 1, 2026; details in the guide to Montana dispensary rules
- Keep it in the trunk — the Glacier Country tourism office says to carry it unopened, in its original packaging, in the trunk or cargo area, and driving impaired is illegal
State totals, regulators and a directory of licensed shops are on the Montana cannabis hub.
FAQ
Is weed legal in Montana for tourists?
Yes. Adults 21 and older with valid government photo ID can buy from licensed dispensaries in counties that allow recreational sales, and no Montana address or medical card is needed. Use is limited to private property.
Can you smoke weed in Glacier National Park?
No. Glacier and Yellowstone are federal land, so possessing or using cannabis there can lead to federal charges even though Montana law allows adult use.
What is the fine for smoking weed in public in Montana?
A person who smokes marijuana in a public place, outside an area licensed for it, faces a civil fine of up to $50 under MCA 16-12-106.
Can I bring Montana cannabis to Canada or Idaho?
No. Carrying it across a state line or into Canada is a federal offense, even where the destination has legal sales.
How much weed can you grow in Montana?
An adult may grow two mature plants and two seedlings, with a household cap of four and four, and registered cardholders may grow four mature plants and four seedlings.
Sources
- Montana Department of Revenue — Montana Department of Revenue — Cannabis · 2026
- Montana Code Annotated (via FindLaw) — MCA 16-12-106 — Personal use and cultivation of marijuana · 2025
- The Marijuana Herald — Montana cannabis sales top $134 million in first five months of 2026 · checked Jun 2026
- Glacier Country (regional tourism office) — Recreational marijuana · 2026
- Montana Department of Revenue — 2025 legislative updates: new cannabis laws in Montana · 2025
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