Any adult 21 or older with a valid government-issued photo ID can buy marijuana in Colorado from a licensed retail store, and the rule applies equally to residents and visitors. The state legalized recreational cannabis through Amendment 64 in 2012, and licensed stores have been serving adult customers since January 2014. The eligibility rule is simple, but the limits on how much you can buy in one visit, where you can shop, and what you can do with the product afterward are worth understanding before you walk in.
Age and ID Requirements
You must be at least 21 to enter the restricted sales floor of a retail cannabis store or to buy any product. Staff check identification at the door and again at the register before ringing up a sale.1Cannabis. Laws About Cannabis Use There is no customer-facing exception, no accompanied-minor rule, and no workaround for someone a few months shy of their birthday.
Acceptable ID means a current document that carries a photograph and your date of birth. A state driver’s license, a passport, or a military ID all qualify. Out-of-state and international IDs are accepted on the same terms, which is why a tourist from Texas or Toronto can buy as easily as a Denver local. If you cannot produce a valid ID, the store will refuse the sale. Employees who let an underage buyer through face fines, and the store itself risks its license.
How Much You Can Buy in One Transaction
Colorado caps a single transaction at one ounce of marijuana flower or the equivalent in other product types. A retail store is prohibited from selling more than that to one person at one time.2Justia. Colorado Code 44-10-601 – Retail Marijuana Store License – Rules – Definitions
Because concentrates and edibles are much stronger by weight than flower, the state uses an equivalency framework so the one-ounce cap means roughly the same thing no matter what you buy:
- Flower: up to one ounce (28 grams)
- Concentrate: up to eight grams of wax, shatter, or similar products
- Edibles: up to 800 milligrams of THC
You can mix product types in the same purchase as long as the combined total stays within the one-ounce equivalent. The statute hands the specific equivalency ratios to the Marijuana Enforcement Division, which sets them by administrative rule.2Justia. Colorado Code 44-10-601 – Retail Marijuana Store License – Rules – Definitions Nonpsychoactive topical products such as lotions and balms sit outside the equivalency calculation.
Where You Can Legally Buy
The only lawful source of recreational cannabis is a store holding both a state retail marijuana license and the required local license. Those stores are distinct from medical marijuana dispensaries, which serve registered patients under a separate licensing framework.3Justia. Colorado Code 44-10-501 – Medical Marijuana Store License Any private sale between individuals is illegal, even if both people are adults.
Under state regulations, retail stores may operate between 8:00 a.m. and midnight, and local governments can shorten those hours.4Legal Information Institute. Colorado Code 1 CCR 212-3-3-245 – Selling and Serving Regulated Marijuana – Hours of Operation
Towns That Have Opted Out
Not every Colorado community has a dispensary. Amendment 64 lets cities and counties ban marijuana businesses within their borders, and roughly half of Colorado’s counties have done so. Many mountain towns and rural areas have no retail stores at all, so if your trip is built around a dispensary visit, confirm there is one where you’re going. The state cannabis website keeps a list of licensed retailers by location.
Delivery
Colorado began allowing retail marijuana delivery in 2021, but only in jurisdictions that have specifically opted in through a local vote or governing board decision. Deliveries go to private residences only, are limited to one per customer per day, and cannot be made to college campuses. A one-dollar surcharge is added to each delivery to fund local law enforcement.5Colorado General Assembly. Regulated Marijuana Delivery
What You’ll Pay at the Register
Recreational marijuana carries a 15 percent state retail marijuana sales tax at the register. Retail marijuana is exempt from Colorado’s standard 2.9 percent state sales tax, so the 15 percent replaces that rate rather than stacking on top of it.6Colorado Department of Revenue. Marijuana Sales Tax A separate 15 percent excise tax applies at the wholesale level when product moves from cultivator to retailer, and that cost is already built into the shelf price. Cities and counties can add their own local taxes on top, so final prices vary by jurisdiction.
Where You Can Use What You Bought
Buying is the straightforward part. The limits on where you can consume catch out more people, especially visitors, than any other rule.
Private Property
A private residence is the default legal consumption spot, provided the property owner allows it. Hotels frequently prohibit marijuana use on the premises and are within their rights to do so, so call ahead if that is your plan.
Public Places
Using marijuana in any public place is illegal. Sidewalks, parks, restaurant patios, concert venues, and ski slopes all count. The violation is a drug petty offense carrying a fine of up to $100 and up to 24 hours of community service.7FindLaw. Colorado Code 18-18-406 – Offenses Relating to Marijuana and Marijuana Concentrate – Definitions Openly using more than two ounces pushes the penalty into the possession tiers covered below.
Licensed Hospitality Businesses
Colorado law carves out an exception for licensed marijuana hospitality businesses, essentially cannabis lounges where you can buy and consume on-site. The public use statute explicitly exempts consumption at these venues.7FindLaw. Colorado Code 18-18-406 – Offenses Relating to Marijuana and Marijuana Concentrate – Definitions Whether a lounge actually exists near you depends on local government approval, and availability is limited to a handful of cities.
Vehicles
You cannot use marijuana in a vehicle on a public road, and you cannot keep an open marijuana container in the passenger area. A container is considered open only when the seal is broken, some contents have been removed, and there is evidence someone consumed marijuana in the vehicle. The open container violation is a class A traffic infraction with a $50 fine plus surcharge.8Justia. Colorado Code 42-4-1305.5 – Motor Vehicle – Open Marijuana Container Driving while impaired carries far steeper consequences, including DUI charges when THC levels reach five nanograms per milliliter of whole blood.9Cannabis. Driving and Traveling
Federal Land and Crossing State Lines
Colorado’s legal market stops at the state border, and sometimes well short of it. National parks, national forests, military bases, and federal courthouses inside Colorado are governed by federal law, under which marijuana remains a controlled substance. Possession of any amount on federal land can bring federal charges. This surprises tourists constantly, because many of the state’s most-visited recreation areas sit on federal land without obvious boundary markers.
Carrying marijuana across any state line is a federal offense regardless of whether the neighboring state has also legalized it. Federal law treats interstate transport as trafficking, and even small personal amounts can trigger up to five years in federal prison and fines up to $250,000. A legal Colorado purchase provides no defense once you cross out.
Airports are their own category. TSA updated its policy in 2026 to permit medical marijuana in carry-on and checked bags following federal rescheduling of certain cannabis products to Schedule III. Recreational marijuana remains prohibited, and the documentation rules around the medical exception are still evolving. When TSA finds marijuana outside the medical exception, the matter goes to local law enforcement. At Denver International Airport that typically means confiscation; at airports in other states it can mean criminal charges.
Penalties for Possession Over the Legal Limits
Colorado decriminalized possession of up to two ounces for adults 21 and older. Beyond that the penalties climb:
- More than two ounces but not more than six ounces: level 2 drug misdemeanor
- More than six ounces: level 1 drug misdemeanor
These thresholds apply to the total amount you are carrying in public, not just what you bought that day.7FindLaw. Colorado Code 18-18-406 – Offenses Relating to Marijuana and Marijuana Concentrate – Definitions Amounts exceeding 12 ounces cross into felony territory, where large quantities are treated as evidence of intent to distribute and carry significantly harsher consequences, including mandatory prison time.
Gifting stays on the right side of the law within limits. Transferring up to two ounces to another adult for free is a petty offense rather than a sale.7FindLaw. Colorado Code 18-18-406 – Offenses Relating to Marijuana and Marijuana Concentrate – Definitions Selling any amount without a license is illegal regardless of quantity.