Colorado Laws Sundance Film Festival Visitors Should Know Before Coming to Boulder

Starting in January 2027, the Sundance Film Festival is making Boulder, Colorado its permanent home. If you are traveling to Boulder for Sundance from another state, there are Colorado laws you should be aware of before you arrive. Colorado handles criminal offenses — particularly DUI, marijuana, and domestic violence — very differently from most other states. Knowing these rules before the festival starts can help you avoid a situation that derails the rest of your trip and follows you home.

Driving Under the Influence Is Treated Aggressively in Colorado

Colorado has two separate impaired driving offenses. DUI applies at a blood alcohol content of 0.08 or higher, or when a driver is substantially impaired. DWAI — Driving While Ability Impaired — applies at a BAC as low as 0.05, which for many people is one or two drinks. DWAI is not a warning or a reduced charge. It is a criminal conviction that goes on your record, carries jail time and fines, and will be reported to your home state’s DMV.

If you are pulled over and an officer suspects impairment, Colorado’s express consent law means you have already agreed to chemical testing simply by driving on Colorado roads. Refusing a test triggers an automatic one-year revocation of your driving privileges in Colorado and the refusal itself can be used as evidence against you at trial.

The drive between Boulder and Denver — US-36, the Boulder Turnpike — is roughly 30 miles. Many Sundance attendees will be staying in Denver, Louisville, Broomfield, or other Front Range cities. If you are attending evening screenings or after-parties where alcohol is being served, plan your transportation in advance. Use rideshares, designate a sober driver, or stay in Boulder. A DUI arrest on the drive back to your Denver hotel will cost you far more than the price of a room.

Marijuana Is Legal to Buy — Not to Use Everywhere

Colorado was one of the first states to legalize recreational marijuana, and dispensaries are easy to find. But there are rules that trip up visitors regularly.

You must be 21 or older to purchase or possess marijuana. You can legally possess up to one ounce. Public consumption — smoking, vaping, or consuming edibles in any public place — is illegal. That includes Pearl Street, outside festival venues, on the CU Boulder campus, in parks, on sidewalks, and in most hotel rooms (check your hotel’s policy). Consuming marijuana in a vehicle is illegal for both drivers and passengers.

Driving while impaired by marijuana is a DUI, and Colorado law creates a permissible inference of impairment at 5 nanograms of THC per milliliter of whole blood. Unlike alcohol, THC metabolizes differently and can remain in your system for hours or even days.

If you are visiting from a state where marijuana is not legal, be aware that a marijuana-related arrest in Colorado — even for a charge that seems minor here — can have consequences in your home state, including impacts on professional licensing, employment, and security clearances.

Domestic Violence Triggers a Mandatory Arrest

This is the Colorado law that surprises out-of-state visitors the most. If police are called to a domestic disturbance — an argument in a hotel room, an altercation at an Airbnb, a confrontation in a parked car — and there is probable cause to believe a crime involving domestic violence occurred, someone is getting arrested. The officer is required by law to make an arrest. There is no discretion to give a warning, separate the parties, or tell everyone to cool down.

Domestic violence in Colorado is not limited to married couples. It applies to current and former dating partners, co-parents, and anyone in an intimate relationship. The arrest triggers a mandatory protection order that prevents the arrested person from contacting the alleged victim — which can mean being locked out of a shared hotel room, unable to retrieve belongings, and separated from a partner for the remainder of the festival.

Bar Fights and Physical Altercations Are Criminal Charges

A shoving match outside a bar or a confrontation in a crowded venue is not just a bad night — it is a potential criminal charge. Third-degree assault in Colorado is a class 1 misdemeanor carrying up to 364 days in jail. Even lesser physical contact can be charged as harassment, which also carries up to 364 days in jail. If the altercation involves a person the defendant has an intimate relationship with, the domestic violence mandatory arrest law applies.

Colorado does have a self-defense statute, but “he started it” is not an automatic defense. Self-defense requires that you used reasonable force to defend against what you reasonably believed was an imminent use of unlawful physical force. Proportionality matters.

Your Colorado Arrest Follows You Home

Colorado participates in the Interstate Driver’s License Compact, which means a DUI or DWAI conviction in Colorado will be reported to your home state’s DMV. Most states will impose their own consequences on your license as a result.

Criminal convictions in Colorado appear in national criminal record databases. Employers, landlords, licensing boards, and immigration authorities can access these records. For professionals in entertainment, media, and technology, a criminal conviction can have career consequences that extend far beyond the legal penalties in Colorado.

If you fail to appear for a court date after returning home, a bench warrant will be issued. This warrant is active nationally — it can surface during a traffic stop in your home state, at an airport, or during any future contact with law enforcement.

What to Do If Something Goes Wrong

Save the number of a Colorado criminal defense attorney in your phone before the festival starts. If you are arrested, exercise your right to remain silent beyond providing your identification, and call an attorney before making any statements. Do not discuss the incident on social media.

If you are from out of state, you need a Colorado-licensed attorney who practices in Boulder County. An attorney in your home state cannot represent you in a Colorado court without being licensed in Colorado. A local attorney can handle court appearances on your behalf, negotiate with the Boulder County DA’s office, and work to resolve the case with minimal disruption to your life and career.

William Bacharach is a Colorado criminal defense attorney who represents clients in Boulder, Denver, Jefferson, Arapahoe, Adams, Douglas, Weld, and Broomfield Counties. If you are visiting Colorado for the Sundance Film Festival and need legal assistance, he is available 24/7, including nights and weekends.

Call (720) 303-5778 for a free, confidential consultation.

This article is for informational purposes only and does not constitute legal advice. Every case is different. Contact a qualified criminal defense attorney to discuss the specific facts of your situation. Past results do not guarantee future outcomes.