If you’ve recently been charged with an offense related to driving under the influence of drugs or alcohol, you may well be asking yourself, “is a DUI a felony in Colorado?”

The short answer is that it can be, but it can also be a misdemeanor, depending mainly on your prior DUI history and the facts of the case at hand.

This article will help you to understand where your case might fit, the key aggravating factors, and what defenses and plea options may be available to you.

Felony vs Misdemeanor DUI

In Colorado, most first‑time DUIs are misdemeanors; only those with aggravating factors would be upgraded to felonies.

Second‑ and third‑time DUI charges are also generally classed as misdemeanors. However, if the violation occurs after three or more prior convictions for DUI, DUI per se, DWAI (driving while ability impaired), or certain related offenses arising out of separate incidents, the new DUI can be charged as a Class 4 Felony.

Colorado law distinguishes between DWAI (driving while ability impaired) and DUI (driving under the influence). DUI is the more serious offense; it applies when you’re substantially impaired or have a blood alcohol concentration (BAC) of 0.08% or higher.

Aggravating Factors

As noted above, certain aggravating factors can increase the seriousness of a DUI case and may influence whether it can be charged as a felony. There may also be separate charges and penalties in some cases.

Multiple Prior DUI/DWAI Convictions

The most important factor when it comes to DUI classification is prior history. The law in Colorado judges repeat offenses much more harshly than once-offs.

As noted above, Colorado law allows a DUI to be charged as a felony if a violation occurs after three or more prior impaired‑driving convictions.

The priors must arise from separate incidents, not multiple charges from the same event.

Unlike many other states, Colorado does not apply a “lookback period” when it comes to felony DUI classification. Any prior impaired-driving conviction on your record, whether from Colorado or another state, counts toward the four-offense threshold, regardless of how long ago it occurred. That said, a five-year lookback does apply to misdemeanor sentencing under C.R.S. § 42-4-1307. If a second DUI occurs within five years of a prior offense, the court cannot suspend or substitute the mandatory 10 consecutive days of jail time with home detention, though options such as work release or education release may still be available.

Serious Injury or Death

When an intoxicated driver causes a crash that results in serious bodily injury or death, prosecutors may file vehicular assault or vehicular homicide charges in addition to or instead of DUI. Both offenses can be felonies even if the DUI itself is a misdemeanor.

According to the Colorado Department of Transportation, there were 236 traffic deaths related to impaired driving statewide in 2025.

Child Passenger

Driving under the influence with a minor in the vehicle can compound your legal exposure significantly. Under C.R.S. § 18-6-401, if a child under 16 is in the car when you are arrested for DUI, prosecutors may file a separate charge of criminally negligent child abuse. Depending on the circumstances, prosecutors may seek to have that sentence run consecutively to the DUI, which would mean serving it on top of whatever penalty the DUI carries.

High BAC or Combined Alcohol and Drugs

If you’re caught driving with a BAC of 0.15% or above, Colorado designates you a Persistent Drunk Driver (PDD) under C.R.S. § 42-1-102(68.5). The underlying charge remains a misdemeanor, but PDD status carries significant administrative consequences, which may include a mandatory two-year ignition interlock requirement, Level II alcohol education and therapy, and SR-22 high-risk insurance.

Drug-related DUI charges come with their own set of complications. Unlike alcohol, drugs like marijuana and cocaine can remain in your system for days or weeks after you consume them, potentially leading to DUI issues even if you were entirely sober at the time of your roadside stop.

Penalties for DUI Convictions in Colorado

Misdemeanor DUI Penalties

For misdemeanor DUI and DWAI, Colorado Revised Statutes §42‑4‑1307 sets out a range of possible penalties, including:

  • Jail time (which can range from days to months depending on prior offenses and other aggravating factors).
  • Fines and court costs.
  • Probation (potentially including alcohol education or treatment.
  • Community service.
  • Driver’s license suspension or revocation.
  • Installation of an ignition interlock device.
  • Increased insurance premiums and other financial consequences.

Misdemeanor DUIs do not always result in jail time, although this is not guaranteed. Even non-jailable offenses have serious consequences. According to the state Department of Transportation, a first‑time DUI in Colorado can cost an offender an average of $13,530 when fines, fees, insurance increases, treatment, and ignition interlock costs are combined.

Felony DUI Penalties

For felony DUI, Colorado law provides for potential state prison sentences and other serious consequences. A class 4 felony DUI can carry:

  • A presumptive prison-sentence range of 2–6 years, with the potential for more in extreme cases.
  • Mandatory conditions if probation is granted, such as 90–180 days in county jail, intensive supervision, and strict treatment requirements.
  • Long‑term or permanent driver’s license restrictions.
  • A felony criminal record, which can affect employment, professional licensing, housing, and civil rights.

There is some good news here. Colorado’s statutes require courts to consider whether incarceration is truly necessary and whether other sanctions or treatment options could protect public safety. Judges will often weigh a defendant’s willingness to participate in treatment, prior efforts to change, and the specific facts of the case before deciding on prison, jail, or probation.

So, even if you are convicted of a felony DUI, you may be able to avoid a lengthy spell behind bars. The representation of an experienced attorney during the sentencing process can be of major benefit in this regard.

Other Consequences

Whether it’s a misdemeanor or a felony, a DUI conviction can bring consequences beyond the courtroom, such as:

  • Professional licensing issues (for nurses, teachers, commercial drivers, etc.).
  • Immigration consequences for non‑citizens.
  • Travel limitations with respect to certain countries.
  • Employment and background check problems.

All of the collateral consequences above are things our lawyers will discuss with you, especially in felony cases.

Potential Defenses in Colorado DUI Cases

Even if there’s strong evidence against you, you shouldn’t lose hope. If you partner with a skilled DUI attorney, there are several different defenses you may be able to raise. Even if these aren’t sufficient to secure an acquittal, they may be enough to get a felony charge knocked down to a misdemeanor.

Challenging the Stop or Arrest

Police must have lawful grounds to stop your vehicle and arrest you. If the initial stop in your case was not based on reasonable suspicion or the arrest lacked probable cause, your attorney will challenge it; if this challenge is successful, it may result in the exclusion of key evidence.

Attacking Breath or Blood Test Reliability

Breath and blood tests have to follow strict procedures around calibration, administration, and chain of custody. Errors in these areas can undermine the reliability of the results.

Your lawyer may question whether the testing device in your case was properly certified, whether the officer followed protocol, or whether medical or dietary factors affected the reading.

Questioning Field Sobriety Tests

Standardized field sobriety tests (like the walk‑and‑turn or one‑leg stand) are far from infallible. Nerves, injuries, age, footwear, and environmental conditions can all affect driver performance, and the finding is ultimately down to the subjective judgment of the observing police officer.

Your lawyer may argue that your poor performance in a field sobriety test does not necessarily show that you were impaired, especially if the video evidence of your roadside stop suggests that the tests were conducted or assessed improperly.

Negotiating Reduced Charges or Alternative Sentencing

Sometimes, the most realistic “defense” is a negotiated outcome that reduces charges or penalties; for example, a plea to DWAI instead of DUI in a marginal case, or a structured sentencing plan that seeks treatment over incarceration. Your lawyer’s goal is to find the path that best protects your future, not just to fight for the sake of fighting.

The Charge Isn’t the Verdict

So, is DUI a felony in Colorado? It can be, but not always. Most first‑time and many second‑ or third‑time DUIs are misdemeanors. A DUI becomes a potential felony when certain aggravating factors (especially multiple prior impaired‑driving convictions) are present, or when serious injury or death leads to additional charges. Even then, there are defenses, negotiation options, and alternative sentencing possibilities that can make a major difference in your outcome.

If you’ve been charged with an intoxicated driving offense, don’t despair. There are plenty of steps you can take to give yourself a better chance at a positive outcome, whether that’s getting a misdemeanor charge instead of a felony, or even securing an acquittal.

Contact the DUI attorneys of Moorhead Law Group today to schedule a free initial consultation about your case. You can reach us over the phone at 303-447-1400 or fill out our online contact form. We stand ready to give you focused, capable representation.