Yes. Colorado is one of the strictest states for bicycle DUI. Bikes are legally defined as vehicles (§42-1-102(112)), so the same charges that apply to motorists apply to riders on two-wheeled devices. The same blood alcohol concentration thresholds apply too: 0.08% for a standard charge, 0.05% for DWAI, and 0.02% for anyone younger than the legal drinking age of 21. Potential consequences may include jail, monetary sanctions that can exceed $10,000 with surcharges, and a criminal record. A fourth violation becomes a felony.
One important protection: the state’s Express Consent law (which forces drivers to submit to testing) does not apply to bicycles. That changes how these cases are investigated and defended.
- How Does Colorado’s Bicycle DUI Law Work?
- What Are the Penalties for Riding a Bike Under the Influence in Colorado?
- What Happens During a Stop for Impaired Riding in Colorado?
- Can You Get a DUI on a Bike in Other States?
- How Dangerous Is Drunk Biking?
- Safety Tips: How to Avoid Drunk Biking in Colorado
- When Do You Need a Lawyer for Impaired Riding?
- Get a FREE case evaluation today
How Does Colorado’s Bicycle DUI Law Work?
The state recognizes two types of alcohol-related charges (§42-4-1301):
- DUI (driving under the influence) applies when alcohol, drugs, or a combination of drugs and alcohol have substantially impaired your ability to operate a vehicle safely. This applies at 0.08% or above, and prosecutors must show impairment beyond the legal limit.
- DWAI (driving while ability impaired) is the lesser violation under Colorado law, but it’s the one that catches most riders off guard. It applies when you’re impaired “to the slightest degree.” A reading between 0.05% and 0.079% is enough. Most people at that level feel fine to keep riding. State law says otherwise, and DWAI is still a criminal charge with potential jail time and monetary sanctions.
For anyone younger than 21, the state has a zero-tolerance policy. A level of just 0.02%, well below the legal limit for adults, can result in DUI charges under Colorado law.
Are Bicycles Subject to Colorado DUI Law?
Colorado defines a vehicle as any wheeled device that can move itself or be moved from one place to another (§42-1-102(112)). A bicycle meets this definition. The DUI statute applies to any person operating one on state roads.
Many riders assume that as long as they don’t drive a moving vehicle with a motor, they’re in the clear after consuming alcohol. If you are weaving in the lane, creating dangerous situations, or otherwise biking recklessly, a police officer has the right to stop and cite you.
Can You Be Charged on an E-Bike in Colorado?
Yes. The state classifies electric bicycles (Class 1, Class 2, and Class 3) as standard bicycles rather than motorized ones. You could face the same violation on an electric bicycle as on a standard pedal bicycle. Express Consent doesn’t apply to electric models either (explained below).
However, a modified electric bicycle with higher power or speed can drift outside the standard classification. If your device is closer to a moped, scooter, or similar motorized scooter device, it may be treated as a motor vehicle, which means Express Consent rules kick in along with the risk of losing a valid driver’s license that comes with impaired driving.
Does Express Consent Apply to Bicycle DUI in Colorado?
No. The state’s Express Consent law (§42-4-1301.1) means that all motor vehicle operators automatically agree to submit to a breath test or blood test when arrested for impaired operation. Refusing triggers automatic revocation.
Bikes are vehicles but NOT motor vehicles. Riders are not subject to Express Consent. Law enforcement cannot force a chemical test, and refusing one does not trigger automatic revocation. However, your refusal can be noted at trial. Officers can also seek a warrant for a blood draw in serious cases.
Without Express Consent, police must build their argument from observations, a field sobriety test, and any voluntary breath or blood evidence. They can’t rely on the automatic testing framework that applies to car drivers.
The reasoning is straightforward: the state wanted impaired riders to face criminal penalties, but didn’t want to hit them with the same automatic testing sanctions designed for people behind the wheel. You’re accountable for drunk biking, but the system recognizes that riding and driving are not the same level of risk.
What Are the Penalties for Riding a Bike Under the Influence in Colorado?
Sanctions in the state can escalate fast. Unlike California (where a bike DUI carries a $250 fine and no jail), Colorado treats drunk biking with penalties that mirror those for drunk driving.
|
Offense |
Jail time |
Fine |
Community service |
|
First DUI (0.08%+) |
5 days to 1 year |
$600 to $1,000 |
48 to 96 hours |
|
First DWAI (0.05%-0.08%) |
2 days to 180 days |
$200 to $500 |
24 to 48 hours |
|
Second DUI |
10 days to 1 year |
Up to $1,500 |
Up to 120 hours |
|
Third DUI |
60 days to 1 year |
Up to $1,500 |
Up to 120 hours |
|
Fourth+ DUI |
Class 4 felony |
Prison time possible |
Per sentencing guidelines |
These amounts don’t include court costs, surcharges, mandatory education classes, and probation fees. Total costs for a first violation in the state can exceed $10,000.
If your BAC is higher than 0.20%, you could face more serious sanctions even on a first charge (§42-4-1307).
First-Offense Bicycle DUI Penalties
A first bicycle DUI is a misdemeanor. In practice, most first-offense DUI cases result in the minimum jail sentence (5 days, or 2 days for DWAI), a fine at the lower end of the range, probation, and mandatory alcohol education classes. These situations usually resolve without the harshest sanctions, but the potential consequences are still significant.
Repeat Charges and Escalating Penalties
A second case can lead to a probation period of at least two years with a suspended one-year jail sentence. After a fourth, any new impaired riding citation becomes a Class 4 felony with prison time rather than county jail.
Other aggravating factors may include a prior conviction for vehicular homicide or assault, or operating with revoked driving privileges.
How Does Impaired Biking Affect Your Driving Record?
There’s no automatic DMV action for riding under the influence because Express Consent doesn’t apply, so you won’t face the same license consequences as a motorist.
Citations for riding under the influence do not add points to your driving record. CRS §42-4-1412(12)(b) specifically exempts such citations from the point system. That doesn’t mean your driving privileges are safe. A judge can still order a suspension as part of your criminal sentence, and the DMV can act through a separate criminal process even without points on your record.
Riding while impaired is a criminal misdemeanor with real legal consequences. It will appear on background checks for employment, housing, and professional licensing.
A prior DUI for cycling counts toward your history, meaning it can escalate sanctions if you are later charged with a motor vehicle case. This is the opposite of California, where a CUI does not count as a prior for motor vehicle charges.
What Happens During a Stop for Impaired Riding in Colorado?
If a police officer suspects you are riding under the influence, based on swerving or struggling to stay balanced, you can expect to be questioned and tested.
Can Police Give You a Breathalyzer While Biking in Colorado?
Once you’re stopped for riding while intoxicated, the officer may ask you to perform field sobriety tests: walk in a straight line, stand on one leg, or follow an object with your eyes. Colorado DUI laws allow the same field tests as those administered to drivers.
Breath and blood tests are a different story. Since Express Consent doesn’t cover bikes, you can’t be required to take one. Officers can still ask, and in serious DUI cases (a crash with injuries, for example), police can seek a warrant for a blood test.
How Can You Fight a Case for Riding Under the Influence?
If you face DUI charges for riding under the influence, several defense strategies may apply depending on your case. A DUI attorney may help you identify the best approach.
- Challenge the DUI arrest or stop. The officer needs probable cause. If the stop wasn’t based on observed signs of intoxication or a traffic violation, the evidence gathered afterward may be thrown out.
- You weren’t riding. Walking it, sitting on it while stopped, or standing next to it does not count as operating a vehicle. Prosecutors have to prove you were riding at the time.
- Sobriety tests are unreliable for riders. These assessments (walk-and-turn, one-leg-stand) were developed for motorists on flat ground. A rider who just finished a long ride on mountain roads may show elevated heart rate, altered balance, and coordination changes that look like impairment but aren’t. Challenging the test results is a common defense strategy.
- No obligation to take a breath test. Express Consent doesn’t apply to bikes. Refusing won’t trigger automatic revocation.
- Medical conditions mimicking impairment. Several factors including fatigue, dehydration, altitude sickness (common in the state for visitors), diabetes, and certain medications can produce symptoms that officers mistake for intoxication.
- Rising BAC. Your level may have been below 0.08% while you were actually riding but risen above the threshold by the time you were tested.
What Happens If You’re Arrested for Riding Under the Influence?
A DUI arrest while riding follows a similar procedure. If suspicions are confirmed, the officer can arrest you. You will be asked to arrange for someone to pick you up or leave the bicycle at the scene and retrieve it when you are sober.
If you pose a serious danger to others or there has been an accident, you will be escorted to the station for booking. The process involves fingerprints, photos, and other personal details. For details on next steps, consult a lawyer. A court date follows, with formal DUI charges filed after review.
Can You Get a DUI on a Bike in Other States?
DUI laws vary widely across states. Colorado sits between Florida (the harshest, with full criminal sanctions and no protections) and California (the lightest, with a custom CUI statute and a $250 maximum fine). The Express Consent exclusion and no-points protection soften an otherwise Florida-equivalent approach.
|
State |
Bike DUI? |
How it works |
Penalties |
Counts as prior? |
|
Colorado |
Yes (full statute) |
The same DUI/DWAI statute applies. Express Consent excluded. |
Jail, $600-$1,500+ fines, felony on 4th |
Yes |
|
Yes (full statute) |
Full statute applies. Implied consent excluded. |
Same as for car drivers. License revocation. |
Yes |
|
|
Yes (separate statute) |
CVC § 21200.5 creates lighter CUI statute |
$250 fine, no jail, no license impact (adults) |
No |
|
|
No |
Not covered under state law |
Public intoxication possible |
N/A |
|
|
No (pedal bikes) |
Pedal bikes excluded. Separate electric bicycle statute. |
Traffic infraction for e-bikes |
N/A |
|
|
Contested |
Applies but §40-6-391(c) penalty exemption |
No appellate resolution |
Unclear |
|
|
Illinois |
No |
Human-powered devices not covered |
N/A |
N/A |
Even in states that won’t charge someone for biking while intoxicated, you may face sanctions for public intoxication, reckless behavior, and endangerment. For the full breakdown, see our state-by-state analysis. Data across states shows that state laws and potential consequences for impaired riding on pedal and electric devices vary dramatically.
How Dangerous Is Drunk Biking?
Colorado is a top cycling state, but impaired riding remains a serious safety risk that contributes to traffic fatalities. Nationally, alcohol involvement was reported in 34% of fatal pedalcyclist crashes in 2023. NHTSA defines alcohol involvement as a BAC of .01 g/dL or higher for the motor vehicle driver, the killed pedalcyclist, or both; NHTSA notes that alcohol presence may or may not have contributed to the crash. In the same report, 18% of fatal pedalcyclist traffic crashes involved a pedalcyclist with a BAC of .08 g/dL or higher.
Even low levels of alcohol impair reaction time and decision-making on two wheels. Mountain roads, high-speed descents, and urban traffic create conditions where impaired judgment can be fatal, especially at intersections and around parked cars.
Safety Tips: How to Avoid Drunk Biking in Colorado
If you’ve been drinking, don’t ride. Alcohol changes your balance and confidence so that bad choices feel smart. Safer choices for getting home include:
- Use rideshare services or a taxi.
- Take public transit services.
- Walk (don’t ride) if you’re close and stable.
- Call a sober friend.
- Plan the ride home before you go out.
Making responsible choices about riding afterward is the simplest way to avoid DUI arrests.
When Do You Need a Lawyer for Impaired Riding?
A simple citation for impaired riding may not seem serious, but DUI charges carry legal consequences that add up quickly. Contact a DUI attorney or law firm if:
- You believe the allegations are untrue.
- The stop or investigation crossed legal lines.
- You’re facing a second or subsequent violation.
- The incident involved a crash with injuries.
Any questions about your rights should be directed to an experienced attorney.
If a driver hit you while you were riding and the police or the insurer is using your intoxication to shift blame, a lawyer can determine who is at fault and to what extent. The state’s modified comparative fault system (50% bar) means that even a rider who was partly impaired can still recover damages if the driver was primarily at fault. Knowing what your claim is worth changes how you respond to the insurer. See our guide on average bicycle accident settlements to understand how intoxication might factor into compensation.
Most accident attorneys who handle bicycle accident cases work on a contingency fee, typically 33% of the settlement. You pay nothing unless you recover compensation. For criminal DUI defense services, an attorney typically bills a flat fee or hourly rate. A free consultation can help you answer questions about whether representation is worth it, and a strong defense can significantly affect the outcome.
If you’re a cyclist who has been in an accident, call today for a free initial consult about your legal claim. We’re here to help with your legal questions. Contact our law firm for coast-to-coast bike accident and personal injury representation.
Since his academic days at the UC Berkeley School of Law, Robert Goldwater has remained a committed advocate for victims of other people’s negligence. His tort law background, together with his unquenchable thirst for justice, helped young Robert found a now-successful law firm – Bicycle Accident Lawyers Group, gathering same-minded and promising attorneys from all over the country.
