Colorado Alcohol Laws: Sales Hours, DUI, and Penalties

Colorado alcohol laws set 21 as the minimum drinking age, allow packaged sales from 8:00 a.m. to midnight every day, let bars and restaurants serve from 7:00 a.m. until 2:00 a.m., and treat impaired driving as two separate offenses: DWAI starting at a 0.05 blood alcohol concentration and DUI at 0.08.¹²

Who Can Drink

Nobody under 21 may buy, possess, or consume alcohol in Colorado. This is a strict-liability offense, so a young person can be charged even without intent or knowledge that the beverage contained alcohol.³ The 21 floor is also required federally: states that drop it lose 8 percent of certain highway funds under the National Minimum Drinking Age Act.⁴

The Private-Residence Exception

A minor may drink at a private residence with the knowledge and consent of a parent or legal guardian, and the property owner must also consent.⁵ That’s it. The exception does not cover bars, restaurants, parks, or any public place. A parent who lets other people’s teenagers drink at the house without those teenagers’ own parents present is not protected and can be charged.

Penalties for Underage Drinkers

The offense is an unclassified petty offense, and it climbs with each repeat:

First offense: a fine up to $100, substance abuse education, or both.
Second offense: a fine up to $100, mandatory education, a possible substance abuse assessment, and up to 24 hours of community service.
Third or later: a fine up to $250, a mandatory assessment with any recommended treatment, and up to 36 hours of community service.

Every conviction carries a $25 surcharge for adolescent prevention programs, which can be waived on financial hardship.³

When Alcohol Can Be Sold

Liquor stores, grocery stores, and convenience stores may sell sealed alcohol from 8:00 a.m. to midnight, seven days a week. There’s no separate Sunday rule.¹ Grocery and convenience stores holding the right retailer license can sell full-strength beer and wine following voter-approved expansions of the older 3.2-beer-only rule. Spirits for off-premises drinking still come only from standalone liquor stores.

When Bars Can Serve

On-premises licensees, meaning bars, restaurants, and clubs, may serve alcohol from 7:00 a.m. to 2:00 a.m. every day. The 2:00 a.m. cutoff is statewide last call. It’s also illegal to serve a visibly intoxicated person or a known habitual drunkard at any hour, no matter how early it is.¹ Establishments that serve past 2:00 a.m. or over-serve customers face administrative fines and license suspensions, with revocation possible for repeat violations.

Impaired Driving: DWAI and DUI

Colorado splits impaired driving into two offenses, and the lower one catches people off guard. DUI applies at a BAC of 0.08 or higher, or when alcohol or drugs leave a driver substantially unable to operate a vehicle safely. DWAI, Driving While Ability Impaired, kicks in at just 0.05 BAC and covers anyone affected “to the slightest degree” by alcohol or drugs.² For many drivers, two drinks with dinner will push BAC past 0.05.

First Offense

A first DWAI is a misdemeanor with 2 to 180 days in jail, a $200 to $500 fine, 24 to 48 hours of community service, and 8 points on your license.⁶ A first DUI is heavier: up to a year in jail with a 5-day mandatory minimum, a $600 to $1,000 fine, 48 to 96 hours of community service, 9 months of license revocation, and a possible ignition interlock device for up to 9 months. Once you add alcohol education (up to 76 hours), SR-22 insurance, and higher premiums, the Colorado State Patrol estimates a first DUI runs about $13,530 on average.⁷

Repeat Offenses and the Felony Line

Second DUI or DWAI: 10 days to 1 year in jail, $600 to $1,500 fine, 48 to 120 hours of community service, and 12 months of license revocation.
Third offense: 60 days to 1 year in jail, the same fine and community service range, and a 24-month license revocation. A third conviction within seven years also triggers a mandatory five-year habitual traffic offender revocation.
Fourth or subsequent offense: a class 4 felony carrying 2 to 6 years in prison and 3 years of mandatory parole.

The felony threshold counts any combination of DUI, DUI per se, and DWAI convictions.² A “persistent drunk driver” designation, triggered by a single BAC of 0.15 or higher or by two or more alcohol-related driving violations, brings heightened administrative consequences on top of the criminal ones.⁶

Express Consent

Driving on any Colorado road counts as consent to a breath or blood test if an officer has probable cause to believe you’re impaired. The sample must be obtained within two hours of driving.⁸ Refusing brings its own license revocation, separate from the criminal case. Commercial drivers who refuse face an additional 24-hour out-of-service order and a one-year revocation of commercial driving privileges.

Open Containers and Drinking in Public

You can’t have an open alcohol container in the passenger area of any vehicle on a public highway, moving or parked. “Open” means any broken seal or partially removed contents. A violation is a class A traffic infraction with a $50 fine plus a $16 surcharge.⁹

The exceptions are narrow: passengers in limousines, party buses, and other vehicles designed for paid transportation; passengers in the living quarters of a motorhome or trailer; and containers stored behind the last upright seat of a vehicle without a trunk or in another area not normally occupied by passengers.⁹

Outside of vehicles, public drinking is generally illegal except on premises licensed for on-site consumption.¹ The main carve-out is a designated “entertainment district,” where a municipality authorizes an open-container zone for participating licensed businesses. Several Colorado cities have set these up, and hours and boundaries vary by city, so check local rules before walking around with a drink.

When Bars and Hosts Can Be Sued

If a licensed establishment knowingly serves someone visibly intoxicated or under 21, and that person later injures a third party, the establishment can be held civilly liable. Liability is capped at $150,000 (adjusted for inflation every two years since the cap was enacted), and any suit must be filed within one year of the sale.¹⁰ The person served can’t sue the establishment; only an injured third party has standing.

The “willfully and knowingly” standard matters. A server who reasonably missed the signs generally isn’t on the hook. A bartender who keeps pouring for someone slurring and stumbling creates real exposure for the business. Social hosts at private parties operate under a different rule: Colorado generally doesn’t impose civil liability on a private host who serves adults, even visibly intoxicated ones. Serving minors is different, and a host who provides or facilitates alcohol for underage guests can face both criminal charges and civil claims if someone gets hurt.

Alcohol Delivery and Takeout

Restaurants and other on-premises licensees may deliver alcohol to homes during the same 7:00 a.m. to midnight window as retail sales. Per-order caps: up to 1,500 milliliters of wine, 144 fluid ounces of beer or hard cider, and one liter of spirits.¹¹

Delivery must be made by an employee of the licensed business who is at least 21 and has finished a seller-server training program. Third-party delivery services aren’t allowed for on-premises licensees. The delivery employee must check ID at the door, log the recipient’s name and identification number, and refuse delivery to anyone under 21 or visibly intoxicated.¹²

Drinking on Federal Lands in Colorado

State law doesn’t stop at the trailhead. Colorado holds more than 24 million acres of federal land, and the rules shift by agency.

In national parks, alcohol is generally allowed, but a superintendent can close specific areas or facilities to open containers, and being intoxicated to a degree that endangers yourself, others, or park resources is a separate federal offense.¹³ The 21 minimum age still applies.

National forest land has no blanket federal alcohol ban. The Forest Service restricts drinking in specific areas through closure orders posted at trailheads and campgrounds. If no order is posted, alcohol is allowed. Check the signs at the trailhead or ranger station before assuming the rules match your last visit.

1
Justia Law. Colorado Revised Statutes Section 44-3-901 – Unlawful Acts
2
Justia Law. Colorado Revised Statutes Section 42-4-1301 – Driving Under the Influence
3
Justia Law. Colorado Revised Statutes Section 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
4
Office of the Law Revision Counsel. 23 USC 158 – National Minimum Drinking Age
5
Alcohol Policy Information System. Colorado State Profile – Underage Drinking
6
Colorado General Assembly. Colorado Drunk Driving Laws – Colorado Law Summary
7
Colorado State Patrol. DUI – Don’t Underestimate Impairment
8
Justia Law. Colorado Revised Statutes Section 42-4-1301.1 – Express Consent
9
Justia Law. Colorado Revised Statutes Section 42-4-1305 – Open Alcoholic Beverage Container Motor Vehicle Prohibited
10
Justia Law. Colorado Revised Statutes Section 44-3-801 – Civil Liability
11
Colorado General Assembly. HB21-1027 Continue Alcohol Beverage Takeout and Delivery
12
Legal Information Institute. 1 CCR 203-2, Regulation 47-1101 – Delivery and Takeout Sales by On-Premises Licensees
13
eCFR. 36 CFR 2.35 – Alcoholic Beverages and Controlled Substances