Colorado Marijuana Law

You must be 21 and older to buy, possess or use retail marijuana. It is illegal to give or sell retail marijuana to minors.

Only licensed retail marijuana stores may sell retail marijuana, and only to those 21 and older. Medical marijuana requires a state red card, which can only be obtained by Colorado residents with a recommendation from a doctor that a patient suffers from a debilitating medical condition that may benefit from medical marijuana. Medical marijuana patients can obtain marijuana from a licensed center, a primary care giver or self grow. For more information about medical marijuana, please visit the Colorado Department of Public Health and the Environment.

Those 21 and older can purchase retail marijuana at licensed retail stores. Other municipalities in Colorado also allow retail marijuana stores. Please go to each city’s website to determine specific marijuana sale and consumption laws.

Retail marijuana is intended for private, personal use. Such use is only legal in certain locations not open or accessible to the public. Marijuana may not be consumed openly or publicly.

Since marijuana is still illegal under federal law, you can’t use on federal land, including national parks and national forests. This includes ski slopes.

No, it is illegal to consume — smoking, eating or vaping — marijuana in public. This includes the following outdoor and indoor areas, and many more: 

• Sidewalks. 
• Parks and amusement parks. 
• Ski resorts. 
• Concert venues. 
• Businesses. 
• Restaurants, cafes or bars. 
• Common areas of apartment buildings or condominiums.

Hotel owners can ban the use and possession of marijuana on their properties, so you may not be able to use in a hotel room. Be sure to research the places you’ll be staying in Colorado.

No more than 2 ounces. Adults 21 and older can have up to 2 ounces of marijuana. Having more can result in legal charges and fines.

Adults over the age of 21 can purchase up to 1 ounce of marijuana at a time.

No, it is illegal to consume marijuana in or around a licensed store. It is also illegal to smoke at indoor-but-public locations such as bars, restaurants and common areas in buildings.

Penalties range from a fine to a possible jail or prison sentence. Colorado State Statutes and Denver Revised Municipal Code spell out the specific penalties for various violations. Schools, universities and employers are allowed to put in place their own disciplinary actions for marijuana-related infractions.

See more information on Colorado Laws About Marijuana Use.

No. Possession laws are the same for all retail marijuana types, and public consumption is always illegal, regardless of form.

Yes. Marijuana may be carried in cars, but it may not be in an open container and cannot cross state boundaries. It is illegal to use or consume marijuana in a motor vehicle and it is illegal to drive under the influence of marijuana.

More Information on Driving and Traveling with Marijuana.

Yes. It is illegal to drive under the influence of marijuana and it can result in a DUI, just like alcohol. Anyone with 5 nanograms or more of delta 9-tetrahydrocannabinol (known as THC) per milliliter in whole blood (CRS 42-4-1301) while driving can be arrested for DUI. The consequences of DUI is dependent on the driver but they can include fines, jail time and a revoked license.

More Information on Driving and Traveling with Marijuana.

No. It is illegal to take marijuana across state lines. DIA prohibits possession, use, display and transfer of all marijuana on its property.

More Information on Traveling with Marijuana.

No. It is illegal to consume marijuana in public, which includes public transportation.

It is illegal to smoke marijuana in a taxi, limousine or any form of government-operated mass transportation.

It is up to the discretion of the hotel if it allows marijuana smoke to be consumed in their smoking rooms (the Colorado Clean Indoor Air Act limits all smoking to at most 25 percent of rooms). You should ask the hotel if it allows it. Denver city laws prohibit marijuana consumption on hotel balconies if visible from any public place.

Denver ordinances only apply within the City and County of Denver. Please go to each city or county’s website to determine specific marijuana sale and consumption laws.

It is illegal to consume, use, display, transfer, distribute, sell or grow retail marijuana at or within any park, parkway, mountain park (including Red Rocks) or other recreational facility, on  any city-owned property (including streets and sidewalks) within 1,000 feet of a public or private elementary, middle, junior high or high school and on the 16th Street Mall (including any city street or sidewalk one block in either direction from the mall). Additionally, DIA prohibits possession, use, display and transfer of all marijuana on its property.

On residential private property, retail marijuana consumption in any outdoor location is illegal unless the person is the property owner or lessee or has been granted express or implied permission by the property owner or lessee. On private non-residential property, marijuana consumption is illegal in any outdoor location if it is clearly visible from a public place.