Colorado E-Bike Laws 2026: Classes, 750 W Limit & Trails

Not legal advice. This is a plain-language summary of Colorado statutes and land-manager policies, last checked October 20, 2026. Laws and trail designations change, so confirm with the agency that manages the road, path or trail before you ride.

Colorado treats a true e-bike much like a regular bicycle, but only if it fits one of three legal classes and stays at or under 750 watts. Anything outside those limits is a motor vehicle under state law, with the licensing, registration and insurance that come with it. Where you can ride also depends on who manages the land: state parks, the Forest Service, the BLM and your town can all have different rules. Here is what the law and the agencies actually say.

Colorado e-bike rules at a glance

Three classes, one power limit. An “electrical assisted bicycle” has two or three wheels, fully operable pedals and an electric motor “not exceeding seven hundred fifty watts of power,” and must fit Class 1, 2 or 3.[1][2]
Outside the classes, it is not an e-bike. The Attorney General says such a vehicle is subject to motor vehicle rules, including insurance, registration and licensing requirements.[3]
Paths: Class 1 and 2 may ride bike or pedestrian paths where bicycles are allowed, unless a local authority prohibits them. Class 3 may not, unless the path is within a street or highway or the local authority permits it.[1]
Age and helmets: riders under 16 may not operate a Class 3 e-bike, and anyone under 18 on a Class 3 must wear a bicycle helmet.[1]
Federal land is different. The Forest Service treats all three classes as motor vehicles, and the BLM does unless a local decision says otherwise.[6][7][8]

Class 1, Class 2 and Class 3 e-bikes explained

Class	How the motor helps	Assistance stops at	Extra requirements
Class 1	Only while you pedal	20 mph	Motor must cut out when you stop pedaling[1]
Class 2	With or without pedaling (throttle)	20 mph	Motor must cut out when the brakes are applied[1]
Class 3	Only while you pedal	28 mph	Speedometer in mph; riders 16+; helmet under 18[1]

These definitions are in C.R.S. 42-1-102(28.5), first set by HB17-1151 and amended by HB25-1197.[1][2] The 2017 law also requires e-bikes to meet the federal bicycle equipment rules in 16 CFR 1512.[1]

Since August 6, 2025, the definition also excludes a vehicle that has been modified so it no longer fits a class, and one that is “designed, manufactured, or intended” to be easily configured outside the classes by a switch, button, software setting or app.[2] In other words, an “off-road mode” that unlocks more speed or power can take a bike out of the e-bike category.

HB25-1197 also added the “multiple mode” e-bike: one that can switch between classes. It must meet the requirements of every class it can operate as.[2]

The 750-watt limit, and the peak vs rated question

Colorado’s definition says the motor may not exceed “seven hundred fifty watts of power.”[2] The Attorney General’s October 12, 2026 advisory repeats that “electrically propelled bicycles with motors that exceed 750 watts are not e-bikes in the State of Colorado.”[3]

What neither the statute nor the advisory says is which wattage counts. Motor makers often publish a rated (continuous) power figure and a higher peak figure. We could not find any Colorado statute, regulation or official guidance that says whether the 750 W limit means rated or peak power. Until an agency or court addresses it, treat this as unresolved. Don’t rely on a seller’s or forum’s reading of it.

Sellers must disclose the motor power in watts at the point of sale, so that number is the place to start.[2]

When an “e-bike” is legally a motor vehicle

Colorado’s definition of “motor vehicle” specifically excludes electrical assisted bicycles, and e-bikes are exempt from vehicle registration.[1] That protection only applies to bikes that fit a class. The AG’s advisory lists the main ways a bike falls outside:[3]

Motor assistance above 28 mph (or above 20 mph for a bike sold as Class 1 or 2).
A motor over 750 watts.
No fully operable pedals.
Modified, or designed to be easily switched, beyond the class limits.[2]

A vehicle like that “could be considered a low-powered scooter or other type of vehicle,” and the AG says the rider would need to meet the same insurance, registration and licensing requirements as those vehicles.[3] Selling one isn’t illegal in itself, but the AG says marketing it as an e-bike without the required disclaimers violates state consumer protection law, and that his office “intends to investigate and enforce.”[3][4]

If a seller uses the words “e-bike,” “electric bike” or similar for a vehicle that doesn’t qualify, the law requires a written disclosure stating that it “IS NOT AN ELECTRICAL ASSISTED BICYCLE” and is “A TYPE OF MOTOR VEHICLE.”[2] If you see that notice, you are not buying an e-bike under Colorado law.

Labels and seller disclosures

Labels on the bike

Since January 1, 2018, every manufacturer or distributor of new e-bikes sold in Colorado must permanently attach a label showing the class number, top assisted speed and motor wattage, in at least 9-point Arial type. Anyone who modifies the speed or motor engagement must replace the label to match.[1]

New for January 1, 2027: for a multiple-mode e-bike, the label must also identify the highest class, or each class, the bike can operate in.[2] The AG’s advisory describes this as applying to new e-bikes generally.[3] The statute text we read ties it to multiple-mode bikes, so we’ve followed the statute here.

What the seller must tell you

Under HB25-1197, a seller must disclose the motor power in watts, the maximum speed, and the class (or that it is multiple-mode). For anything that can run as Class 3, the seller must also state that it is unlawful for anyone under 16 to operate it in Colorado.[2]

Battery certification

Lithium-ion batteries sold as part of or for an e-bike must be certified by an accredited testing laboratory to a standard referenced in UL 2849 or EN 15194, or another standard approved by the state fire prevention division. The certification or lab name must appear on the packaging, documentation, bike or battery. Used and rental bikes are exempt from the display rule.[2]

Where you can ride in Colorado

Roads, bike lanes and paths

E-bikes that fit a class are treated like bicycles on roads. On bike or pedestrian paths:[1]

Class 1 and Class 2 may ride where bicycles are authorized, but a local authority may prohibit them on paths it manages.
Class 3 may not ride a bike or pedestrian path unless the path is within a street or highway, or the local authority permits it.

Colorado state parks and state lands

Colorado Parks and Wildlife says Class 1 and 2 e-bikes are allowed in state parks on roads, designated bike lanes, and multi-use trails and other areas open to non-motorized biking. E-bikes need no registration or permit on CPW-managed land.[5] CPW’s page doesn’t mention Class 3 in state parks, so check with the park before riding one.

State Wildlife Areas and State Trust Lands are stricter. E-bikes are allowed only on designated roads and in designated camping or parking areas where motor vehicles are allowed.[5]

National forests (USFS)

The Forest Service treats Class 1, 2 and 3 e-bikes as motor vehicles. They are allowed on motorized roads and trails, and local units can open non-motorized trails only through a formal designation process.[6] The White River National Forest (Vail, Aspen, Glenwood Springs) states it plainly: e-bikes are not permitted on its non-motorized trails, “including those that are open to non-motorized mountain bikes.” Riders should use the forest’s Motor Vehicle Use Map.[7] Some ski resorts operating under Forest Service permits allow e-bikes within their permit areas; check with the resort.[6][7]

BLM land

The BLM allows e-bikes on roads and trails open to off-highway vehicles. On trails limited to bicycles and non-motorized travel, e-bikes are allowed “ONLY IF” a BLM manager has issued a written decision authorizing them.[8][9] Vehicles above 28 mph or 750 watts are managed as OHVs.[8]

Eagle, Gypsum, Carbondale and the Colorado River Valley: the BLM Colorado River Valley Field Office has proposed allowing Class 1 e-bikes on all of its currently designated mechanized mountain bike trails. It says the area has over 220 miles of singletrack, about 18 miles of which (at the Grand Hogback system north of Rifle) are already open to Class 1. The trail systems are managed with partners including Eagle County and the towns of Eagle, Gypsum and Carbondale. Public scoping closed March 25, 2026, and the project status was still “Planned – Preparation and Planning” when we checked.[10] Until a decision is issued, the current rules stay in place.

Local examples: Vail and Eagle County

Town of Vail: the town code allows Class 1 and 2 e-bikes, with the motor on, on town bicycle and pedestrian paths, and prohibits Class 3 on all of them. Motors can’t be used at the Vail Nature Center, Betty Ford Alpine Garden, Village Streamwalk, playgrounds, turf, soft-surface trails or natural areas. Riders must be 16 or older, and e-bikes need an audible warning device.[11]
Town of Eagle: the 2024 e-bike ordinance sets a 15 mph limit on paths, sidewalks and non-motorized trails. Riders under 18 must wear a helmet, and e-bikes need fixed lights when lighting is required. E-bikes are not allowed on soft-surface trails in town other than the Second Gulch Trail.[12]
Eagle County Open Space: the county’s general rules list says motorized trail access, “including electronic motors (e-bikes),” is prohibited on Open Space properties, and individual properties may post more rules.[13] Eagle County’s ECO Trails FAQ (dated “as of February 2020”) says e-bikes are legal on county non-motorized trails under state law, but not on Forest Service land such as the upper Vail Pass Trail.[14] Because those two pages differ in scope and date, check the posted rules for the specific trail.

Other towns and counties set their own path rules, so the posted sign or the managing agency has the final word.[1][3]

Riding an e-MTB on trails where it’s allowed? Tires and protection matter more at e-bike weights and speeds. See our best e-MTB tires, MTB helmets and bike lights guides.

Before you buy an e-bike in Colorado

Check the label for class, top assisted speed and motor wattage.[1]
Ask for the seller’s required disclosures: watts, maximum speed and class.[2]
Be wary of “unlockable” modes or software that raises speed or power. They can take the bike outside the e-bike definition.[2]
Look for battery certification marks or the testing lab’s name.[2]
Buying for a teen? Remember that Class 3 is off limits under 16, and check your town’s age rules too (Vail requires 16+ for all e-bikes).[1][11]

FAQ

What are the e-bike classes in Colorado?

Class 1 assists only while pedaling and stops at 20 mph. Class 2 can assist without pedaling (throttle) and stops at 20 mph. Class 3 assists only while pedaling, stops at 28 mph and needs a speedometer. All three are limited to 750 watts.[1][2]

Do I need a license, registration or insurance for an e-bike in Colorado?

Not for an e-bike that fits Class 1, 2 or 3. State law exempts them from registration and excludes them from the definition of motor vehicle.[1] A vehicle outside the classes is subject to motor vehicle requirements, including licensing, registration and insurance.[3]

Can I ride an e-bike on mountain bike trails in Colorado?

It depends on who manages the trail. Colorado state parks allow Class 1 and 2 where non-motorized biking is allowed.[5] National forests allow e-bikes only on motorized routes unless a trail has been designated for them.[6][7] BLM non-motorized trails need a written authorization.[8] Towns and counties set their own rules.

Is the 750-watt limit peak or rated power?

Colorado law doesn’t say. The statute says “not exceeding seven hundred fifty watts of power,” and the AG’s advisory doesn’t address it.[2][3] We haven’t found an official interpretation.

How old do you have to be to ride an e-bike in Colorado?

State law sets 16 as the minimum age for Class 3, with a helmet required under 18.[1] We didn’t find a statewide minimum age for Class 1 or 2, but local rules can set one: Vail requires riders to be 16 or older.[11]

What changes on January 1, 2027?

Labels on multiple-mode e-bikes must also identify the highest class or each class the bike can operate in.[2] Single-class e-bikes already have to show their class, top assisted speed and wattage.[1]