
Colorado Motorcycle Laws & Helmet Regulations: The 2026 Legal Guide

Colorado motorcycle law, governed primarily by C.R.S. Title 42, establishes age-based helmet requirements, mandatory eye protection for all riders, and—as of August 2024—conditional lane filtering permissions. Unlike many states, Colorado does not require helmets for riders 18 and older, but failure to wear protective gear can significantly impact legal liability and insurance compensation in the event of a crash.
The rules changed in August 2024. If you’re still riding by the old rulebook, you’re risking a ticket—or worse, a denied insurance claim. From the new lane filtering permissions to the misunderstood eye protection mandate, here is the definitive, lawyer-verified guide to Colorado motorcycle laws.
Injured in a Colorado Motorcycle Accident?
If you’ve been hurt in a crash, understanding these laws is just the first step. The team at Cheney Galluzzi & Howard helps Colorado riders protect both their safety and their legal rights.
- Colorado Motorcycle Accident Injury Claims – We fight for full compensation when negligent drivers cause harm.
- Wrongful Death After a Motorcycle Crash – Holding responsible parties accountable when families lose a loved one.
- Truck vs. Motorcycle Collision Cases – Specialized representation for blind spot and commercial vehicle accidents.
Free Motorcycle Accident Case Review – No upfront fees. We only get paid when we secure your recovery.
Colorado Helmet Law: Who Must Wear One (C.R.S. 42-4-1502)
Colorado does not require helmets for riders 18 years of age or older. This places Colorado among the minority of states with a “partial helmet law.” However, riders under 18 must wear a helmet that meets federal safety standards.
The statute is clear: Any person operating or riding as a passenger on a motorcycle must wear protective headgear if they are under 18 years of age. The helmet must comply with the standards established by the U.S. Department of Transportation (DOT).
What This Means for Adult Riders
If you’re 18 or older, you are legally permitted to ride without a helmet in Colorado. But here’s the critical piece most riders miss: just because it’s legal doesn’t mean it’s consequence-free in a lawsuit.
Insurance defense attorneys routinely argue that an unhelmeted rider “failed to mitigate damages”—even when the rider broke no law. This argument can reduce your compensation by tens or even hundreds of thousands of dollars. Colorado’s Modified Comparative Negligence law (discussed below) allows insurers to assign you a percentage of fault for your injuries, not just the accident itself.
We’ve seen adjusters cut settlement offers in half by claiming the rider “assumed the risk” by not wearing a helmet. We fight those arguments aggressively, but the best defense is knowing how the law intersects with your legal rights before you ride.
Motorcycle Accident Injury Representation: Protecting Victims’ Rights for Full The Mandatory Eye Protection Requirement (C.R.S. 42-4-232)
Here’s the law that catches riders off guard: All motorcycle operators and passengers in Colorado must wear eye protection, regardless of age.
This requirement is satisfied by wearing glasses, goggles, or a face shield. If your motorcycle is equipped with a windscreen, you may ride without additional eye protection—but the windscreen must meet minimum height and transparency standards.
Why This Matters
A violation of the eye protection law is a Class A traffic infraction. But beyond the fine, failing to wear proper eye protection can be used against you in an injury claim. Defense attorneys will argue that your failure to comply with safety regulations contributed to the severity of your injuries or your inability to avoid the collision.
If you’re cited for an eye protection violation after a crash, contact an attorney immediately. That citation can become evidence in a liability dispute.
Lane Filtering in Colorado: The 2024 SB24-079 Update
As of August 7, 2024, Colorado became one of the few states to explicitly legalize lane filtering under specific conditions. This is a major development, but it comes with strict limitations that many riders misunderstand.
What Lane Filtering Is (and Isn’t)
Lane filtering is the practice of riding a motorcycle between lanes of stopped or slow-moving traffic. Under SB24-079 (codified as C.R.S. 42-4-1503), lane filtering is legal only when:
- Traffic is completely stopped (not just slow-moving).
- The motorcycle is traveling 15 mph or less.
- The roadway has at least two adjacent lanes traveling in the same direction.
- The motorcycle does not exceed the speed limit posted for that roadway.
Lane splitting—riding between lanes of moving traffic at highway speeds—remains illegal in Colorado.
Fact vs. Fiction: Lane Filtering Rules
| Fiction | Fact |
| “I can ride between cars on I-25 at 40 mph.” | You can only filter if traffic is stopped and you are moving 15 mph or less. |
| “Lane filtering is the same as lane splitting.” | No. Lane splitting (moving traffic) is illegal. Filtering (stopped traffic) is legal under strict conditions. |
| “If I’m filtering legally, I can’t be blamed for a crash.” | Wrong. If a driver opens a door or changes lanes and hits you, liability will depend on whether you were following SB24-079 exactly. |
Why This Law Matters for Your Claim
If you’re involved in a crash while lane filtering, the first question an insurance adjuster will ask is: Were you complying with C.R.S. 42-4-1503?
If you were filtering at 20 mph, or if traffic was moving slowly (not stopped), the insurer will argue you were breaking the law and therefore at fault. Even if the other driver violated your right-of-way, your non-compliance can reduce or eliminate your recovery under Colorado’s comparative negligence rules.
We’ve already seen cases where insurers deny claims outright by mischaracterizing legal filtering as illegal splitting. Documentation—dashcam footage, witness statements, traffic data—is critical.
Motorcycle Insurance Requirements in Colorado
Colorado law requires all motor vehicle operators, including motorcyclists, to carry minimum liability insurance. The mandatory minimums are:
- $25,000 per person for bodily injury
- $50,000 per accident for bodily injury (total)
- $15,000 per accident for property damage
Why These Minimums Are Dangerously Low
A serious motorcycle crash can result in medical bills exceeding $100,000, lost wages, and long-term rehabilitation costs. If the at-fault driver carries only the state minimum, you may recover far less than your actual damages.
This is why Uninsured/Underinsured Motorist (UM/UIM) coverage is essential. UM/UIM coverage protects you when the at-fault driver has no insurance or insufficient coverage. In Colorado, insurers must offer UM/UIM coverage, but you can decline it in writing. We strongly advise against declining this coverage.
If you’re hit by an uninsured driver and you don’t have UM coverage, your only option may be to sue the individual directly—often an impractical solution if they lack assets.
How Colorado’s Comparative Negligence Law Affects Riders
Colorado follows a Modified Comparative Negligence rule with a 50% bar. This means:
- If you are found less than 50% at fault for your injuries, you can recover damages—but your award is reduced by your percentage of fault.
If you are 50% or more at fault, you recover nothing.
How This Impacts Helmet and Eye Protection Decisions
Even though Colorado doesn’t require helmets for adults, insurance companies will argue that your choice not to wear one makes you partially responsible for your injuries. This is the “failure to mitigate damages” defense.
Example: You’re rear-ended at a stoplight. The other driver is clearly at fault for the collision. But you weren’t wearing a helmet, and you sustained a traumatic brain injury. The defense argues you’re 40% responsible for the severity of your injuries. Your $500,000 verdict is reduced to $300,000.
This is why we say: It’s more than money. It’s about knowing how the law protects your rights before you need them.
We don’t just tell you to wear a helmet because it’s safe. We tell you because we’ve seen insurance adjusters try to cut a family’s settlement in half by arguing the rider “failed to mitigate damages.” We fight those arguments, but knowing the law helps you avoid them entirely.
Licensing Requirements: The Class M Endorsement
To legally operate a motorcycle in Colorado, you must hold a valid driver’s license with a Class M endorsement. This endorsement requires passing both a written knowledge test and an on-cycle skills test.
Alternatively, you may obtain a motorcycle-only license (Class M without an underlying driver’s license) if you do not intend to operate a standard passenger vehicle.
Why This Matters in a Crash
If you’re involved in an accident while riding without a valid Class M endorsement, you are operating illegally. This can:
- Result in criminal charges (driving without a valid license).
- Provide grounds for the insurance company to deny your claim entirely.
- Be used as evidence of negligence per se in a civil lawsuit.
Even if the other driver caused the crash, your lack of a proper license can be leveraged to reduce your recovery or shift liability onto you.
Frequently Asked Questions
Does Colorado require motorcycle helmets?
Colorado requires helmets only for riders under 18 years of age. Adult riders (18+) are not required to wear helmets, but choosing not to wear one can affect liability and compensation in an injury claim.
What is the difference between lane splitting and lane filtering?
Lane splitting is riding between lanes of moving traffic and is illegal in Colorado. Lane filtering is riding between lanes of stopped traffic at 15 mph or less and is legal as of August 2024 under specific conditions (C.R.S. 42-4-1503).
Can I sue if I wasn’t wearing a helmet?
Yes. Colorado does not prohibit you from filing a claim if you weren’t wearing a helmet. However, the defense will likely argue that your failure to wear a helmet contributed to your injuries, which can reduce your compensation under comparative negligence laws.
Is eye protection required for all motorcycle riders in Colorado?
Yes. All riders and passengers must wear eye protection (glasses, goggles, or a face shield) unless the motorcycle is equipped with a compliant windscreen (C.R.S. 42-4-232).
How long does a motorcycle accident settlement take?
Settlement timelines vary widely depending on the complexity of the case, the severity of injuries, and the cooperation of the insurance company. Simple cases may settle in a few months, while complex cases involving disputed liability or severe injuries can take a year or more.
Is it worth getting a lawyer for a motorcycle accident?
If you sustained significant injuries, missed work, or face disputed liability, an attorney can substantially increase your recovery. Insurance companies routinely undervalue claims involving motorcyclists, often blaming the rider regardless of fault.
What should I do immediately after a motorcycle crash?
Call 911 and report the accident. Seek medical attention, even if injuries seem minor. Document the scene with photos and witness information. Do not admit fault or make recorded statements to insurers without legal advice. Contact an experienced motorcycle accident attorney as soon as possible.
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