Montana E-Bike Laws: 20 MPH Rule, Helmets, Sidewalks, Trails, Cities, and Schools

Last Updated on September 11, 2026 by Kristina

Last researched and verified: September 2026

Montana e-bike laws are different from the three-class rules used in many other states. Montana does not currently use the standard Class 1, Class 2, and Class 3 system in its statewide definition of an electrically assisted bicycle. Instead, Montana law uses a 20 mph performance test and includes a qualifying electrically assisted bicycle within the legal definition of a bicycle.

That makes the statewide rules fairly straightforward for many 20 mph e-bikes, but it does not mean every trail, city, campus, or public property follows the same rules. Billings, Missoula, Helena, Great Falls, Kalispell, and Whitefish all have local bicycle provisions worth knowing, while Montana State University, the University of Montana, Montana Tech, and Carroll College have their own campus policies.

Public lands add another layer. Glacier National Park, Yellowstone National Park, U.S. Forest Service land, BLM land, Montana state lands, city open space, and individual trail systems can use different e-bike definitions and access rules.

If you are comparing Montana with another state, start with my state-by-state e-bike law guide. It also helps to understand Class 1, Class 2, and Class 3 e-bikes, because some federal properties and Montana cities use class terminology even though Montana’s statewide e-bike definition does not.

Montana E-Bike Laws at a Glance

Question	Montana Statewide Rule
How does Montana define an e-bike?	An electrically assisted bicycle has two tandem wheels and an electric motor capable of propelling the vehicle and a 170 lb rider no faster than 20 mph on a paved, level surface.
Does Montana use Class 1, 2, and 3?	No. Those classes are not part of the current statewide e-bike definition.
State motor wattage limit?	The current Montana electrically assisted bicycle definition does not specify a wattage limit.
Throttle versus pedal assist?	The statewide definition does not divide e-bikes into throttle and pedal-assist classes.
Driver’s license?	No state motor-vehicle driver’s license requirement for an e-bike that qualifies as a bicycle under Montana law.
Motor-vehicle title or plate?	No for a qualifying e-bike. Montana’s motor-vehicle title and registration requirements apply to motor vehicles and other specifically listed vehicles, while a qualifying e-bike is a bicycle.
State motor-vehicle insurance?	No for a qualifying e-bike. Montana’s mandatory liability insurance law applies to motor vehicles.
Statewide minimum age?	I did not find an e-bike-specific statewide minimum rider age in the current bicycle statutes reviewed for this guide.
Statewide bicycle helmet requirement?	I did not find a statewide helmet requirement for riders of qualifying e-bikes. Local rules may be stricter.
Road access?	Qualifying e-bikes are bicycles and may generally use roadways and paved shoulders subject to Montana bicycle traffic rules.
Sidewalks?	No blanket statewide bicycle sidewalk ban. Riders must yield to pedestrians, signal before passing, obey signs, and check stricter local rules.
Trails?	Depends on the land manager. State road law does not create universal trail access.

Before You Ride: A 4-Step Montana E-Bike Check

1. Check your bike. Does it actually fit Montana’s electrically assisted bicycle definition, including the 20 mph statutory test?
2. Check the city. Sidewalk, downtown, shared-use path, helmet, registration, and parking rules can change by municipality.
3. Check the property manager. A state park, National Forest, BLM property, National Park, campus, city open-space system, or private trail may have its own e-bike rule.
4. Check posted signs before riding. Temporary closures, seasonal restrictions, trail designations, construction, wildlife conditions, and local traffic controls can override what normally applies.

⚖️ Law Research Note

I reviewed current state statutes, agency guidance, and available local rules when this guide was updated. E-bike laws can change, and cities, parks, trails, campuses, and property managers may impose additional restrictions. Confirm current requirements before riding.

Who This Guide Is For

This guide primarily covers electric bikes that qualify as electrically assisted bicycles under Montana law. It should not be used to assume that an e-moto, electric motorcycle, modified high-speed bike, or other electric two-wheeler receives the same treatment.

If your bike has been unlocked, modified, reprogrammed, or designed for speeds above Montana’s statutory e-bike limit, check its legal classification separately before using bicycle-only routes or relying on bicycle-specific exemptions.

How Montana Defines an Electric Bike

The controlling starting point is Montana Code Annotated 61-8-102.

Montana defines an electrically assisted bicycle as a vehicle on which a person may ride that has two tandem wheels and an electric motor capable of propelling the vehicle and a rider weighing 170 lb no faster than 20 mph on a paved, level surface.

The same statute specifically includes an electrically assisted bicycle within the definition of a bicycle.

Notably, this statewide definition does not specify a motor wattage limit, does not divide e-bikes into throttle and pedal-assist categories, and does not use Class 1, Class 2, or Class 3 labels.

Montana Does Not Use the Standard Three-Class System Statewide

This is one of the most important points for riders moving to Montana or visiting from another state.

A manufacturer may label your bike Class 1, Class 2, or Class 3 because those terms are widely used throughout the country. That label does not replace Montana’s own statutory definition when determining whether the vehicle is an electrically assisted bicycle under state traffic law.

Some Montana cities and federal land managers do use class terminology, however, which is why you may encounter Class 1, 2, or 3 rules after leaving an ordinary city street.

20 MPH vs. 28 MPH vs. High-Powered Electric Bikes in Montana

Bike Type	Typical Capability	Montana State-Law Issue	What I Would Check
20 mph e-bike meeting Montana’s definition	Motor capability satisfies Montana’s 20 mph statutory test	Included within Montana’s definition of a bicycle	Local city, trail, campus, and land-manager rules
Typical Class 1	Pedal assist to 20 mph	May fit Montana’s definition if the particular bike satisfies the Montana statutory test	Actual specifications and local destination rules
Typical Class 2	Throttle assistance to 20 mph	Montana does not create a separate throttle class. A qualifying vehicle may still fit the state definition	Actual speed capability and destination-specific restrictions
Typical Class 3	Pedal assistance to 28 mph	A bike capable of exceeding Montana’s 20 mph statutory e-bike test may fall outside the state’s electrically assisted bicycle definition	Exact legal classification before relying on bicycle rules
Unlocked or modified e-bike	Varies, potentially above original assistance limit	A modification that changes the bike’s capability can affect whether it still satisfies Montana’s definition	Current configuration, speed capability, and possible alternate vehicle classification
High-powered e-moto or motorcycle-style device	Often substantially faster or built differently from a conventional e-bike	Do not assume it is an electrically assisted bicycle	Moped, motorcycle, off-highway vehicle, or other applicable rules depending on its design and use

Does a 28 MPH Class 3 E-Bike Automatically Become a Moped?

No automatic conclusion like that appears in Montana’s e-bike statute.

Montana separately defines a moped using factors including wheels, foot pedals, power output, unassisted speed, and drive-system characteristics. A bike that falls outside the 20 mph electrically assisted bicycle definition therefore needs to be classified from its actual specifications rather than simply being called a moped because it can assist to 28 mph.

That is why I would be cautious with any Montana guide that says “Class 3 equals moped” without examining the vehicle.

What If You Unlock or Modify an E-Bike?

Montana’s statutory definition is based on what the electric motor is capable of doing under the specified test.

If a controller setting, replacement motor, software change, speed-limiter removal, or other modification changes that capability so the bike no longer meets the 20 mph definition, you should not assume the vehicle continues to qualify as an electrically assisted bicycle.

The same caution applies to bikes sold with an “off-road mode,” unlock code, or user-selectable setting that substantially changes motor-assisted speed. The safest approach is to evaluate the bike in the configuration in which you actually operate it.

Do not assume that staying below 20 mph while riding makes a higher-capability bike legally identical to a bike whose motor meets Montana’s definition.

License, Registration, Title, Plate, and Insurance

Montana’s broader vehicle definitions are important here. MCA 61-1-101 excludes a bicycle from the definition of a motor vehicle. Because Montana’s traffic definition of bicycle includes a qualifying electrically assisted bicycle, the ordinary motor-vehicle rules do not automatically attach to it.

Driver’s License

MCA 61-5-102 requires a driver’s license to drive a motor vehicle on a Montana highway. A qualifying electrically assisted bicycle is a bicycle, not a motor vehicle under Title 61.

State Motor-Vehicle Title

Montana’s certificate-of-title statute applies to motor vehicles and other specifically listed vehicle types. A qualifying e-bike is not included as a motor vehicle.

State Registration and License Plate

The state’s motor-vehicle registration and plate requirements likewise do not create a state motor-vehicle registration requirement for a qualifying electrically assisted bicycle.

Mandatory Motor-Vehicle Insurance

Montana’s mandatory liability insurance statute applies to motor vehicles. It does not create a motor-vehicle liability insurance requirement for a qualifying electrically assisted bicycle.

But Cities Can Require Bicycle Registration

This is an important exception.

MCA 61-12-101 expressly allows local authorities to regulate bicycles and to require bicycle registration, licensing, and a registration fee.

Billings and Kalispell are examples of why that local authority matters.

Montana Helmet and Age Rules

I did not find an e-bike-specific statewide minimum rider age or bicycle helmet requirement in the current Montana bicycle statutes reviewed for this September 2026 update.

Montana does have separate helmet requirements for certain riders of motorcycles, mopeds, and motorized scooters, which is another reason not to assume a faster electric vehicle remains a bicycle.

Local governments can also impose bicycle helmet requirements. Billings requires bicycle riders under 16 to wear a properly fitted and securely fastened bicycle helmet.

Even where a helmet is not legally required, I recommend one for e-bike riding. You can see the features I look for in my e-bike helmet guide.

Roads, Paved Shoulders, and Bike Lanes

Under MCA 61-8-605, a bicycle may be operated on a roadway or paved shoulder.

When traveling slower than normal traffic, a rider generally uses the right-hand lane or a paved shoulder when the shoulder provides a reasonable margin of safety. The statute includes exceptions for situations such as preparing for a left turn, passing, avoiding hazards, and circumstances where riding farther right would not be safe.

MCA 61-8-602 generally gives bicycle operators the rights and duties applicable to other vehicle drivers, subject to bicycle-specific provisions and rules that cannot logically apply to bicycles.

For more practical riding guidance, see my e-bike rules of the road guide.

Are E-Bikes Allowed on Sidewalks in Montana?

Montana does not impose one blanket statewide ban on bicycle riding on sidewalks.

Under MCA 61-8-608, a bicycle rider on a sidewalk or in a crosswalk must yield to pedestrians and give an audible signal before overtaking and passing them. A bicycle may not be ridden where an official traffic-control device prohibits that use.

Local governments can be considerably stricter. Billings restricts business-district sidewalks, Missoula restricts older riders in its central business district, Kalispell prohibits bicycle riding on city sidewalks, Great Falls restricts which sidewalks can be used, and Whitefish has its own detailed e-bike sidewalk rules.

For more background, see my e-bike sidewalk laws guide.

Required Lights, Reflectors, and Brakes

MCA 61-8-607 requires specific equipment when a bicycle is used at dawn, dusk, or nighttime.

• A white front light must be visible from at least 500 feet.
• A qualifying red rear light or red reflector must be visible from at least 500 feet under the conditions described in the statute.
• Reflective material must make the bicycle visible from the left and right sides from at least 500 feet when illuminated by low-beam vehicle headlights.
• The bicycle must have a brake capable of stopping it within no more than 25 feet from 10 mph on dry, level, clean pavement.

Montana City E-Bike Comparison Chart

City	Sidewalk or Path Rule	Other Important Detail
Billings	No bicycle riding on sidewalks in defined business districts. Elsewhere, sidewalk riders must yield to pedestrians.	Helmet required for bicycle riders under 16. Published city bicycle provisions also contain licensing and impoundment rules.
Missoula	Riders age 15+ may not ride bicycles on sidewalks in the central business district and may not ride where signs prohibit it.	Sidewalk and crosswalk riders must yield and signal before passing pedestrians.
Helena	The city says its e-bike motorized-use determination does not prohibit e-bikes on city streets and sidewalks.	E-bikes are treated as motorized for restrictions affecting Mount Helena and Mount Ascension open-space lands.
Great Falls	Bicycle sidewalk use is restricted, with exceptions including River’s Edge Trail portions, approved signs, and conditions making street travel unsafe.	Check the current River’s Edge Trail map and signs for the exact route.
Kalispell	The current online city code prohibits bicycle riding on sidewalks throughout the corporate limits, except authorized law enforcement.	The code also still contains an annual bicycle-license requirement and an impoundment provision for unlicensed bicycles.
Whitefish	Current 2026 code expressly allows Type 1 and Type 2 e-bikes on most sidewalks when operated prudently, but prohibits bicycles and e-bikes on the Central Avenue sidewalk from Railway Street to East Third Street.	Type 1 and Type 2 e-bikes are expressly allowed on city shared-use paths at no more than 15 mph. The separate Whitefish Trail prohibits e-bikes.

Billings E-Bike Rules

The City of Billings bicycle laws prohibit riding a bicycle on a sidewalk within the city’s defined business districts. The city lists several commercial zoning districts within that definition.

Billings also requires anyone under 16 operating a bicycle upon a way within city limits to wear a properly fitted and securely fastened bicycle helmet.

The city’s published bicycle provisions also contain local licensing and impoundment language, including a requirement that a city resident obtain a license before an impounded unlicensed bicycle is returned.

Missoula E-Bike Rules

Missoula’s bicycle sidewalk provisions are age- and location-specific.

Under Missoula’s published ordinance materials, a person age 15 or older may not ride a bicycle on a sidewalk within the central business district.

A rider age 15 or older also may not ride on a sidewalk where an official traffic-control device prohibits bicycle riding. Sidewalk and crosswalk riders must yield to pedestrians and give an audible signal before overtaking them.

Helena, Mount Helena, and Mount Ascension

Helena provides an excellent example of why street access and trail access should not be treated as the same question.

The City of Helena’s e-bike information says that on April 14, 2021, the City Commission determined e-bikes should be treated as motorized for restrictions under Helena City Code 7-12-3(C) or applicable land deeds.

The city says this predominantly affects open-space lands on Mount Helena and Mount Ascension. The same city guidance specifically states that the determination does not prohibit e-bike use on city streets and sidewalks.

Great Falls and the River’s Edge Trail

Great Falls has a more restrictive sidewalk rule than the statewide baseline.

City code materials for Section 12.11.020 state that, unless city-approved signs allow otherwise or street conditions make bicycle travel unsafe, bicycles may be ridden on sidewalk portions that are part of the River’s Edge Trail System.

The city’s transportation planning documents describe the River’s Edge Trail as a network containing more than 20 miles of paved shared-use path and more than 35 miles of gravel natural-surface trail.

Because the system includes different surfaces and locations, check the current trail map and posted restrictions instead of assuming every segment has identical rules.

Kalispell E-Bike and Bicycle Rules

Kalispell stands out because its current online bicycle code contains both a broad sidewalk prohibition and old-style bicycle licensing provisions.

Section 17-114 says it is unlawful, except for authorized law enforcement personnel, to ride a bicycle on a sidewalk of a street or avenue within the city’s corporate limits.

The same current online code also says a bicycle used or operated within city limits must have a city bicycle license and contains an impoundment provision for unlicensed bicycles.

Those licensing sections use older code language and list very small historical fees. Because of that, I would confirm the city’s current administrative and enforcement practice before making a special trip to obtain a license, while still treating the codified requirement seriously.

Whitefish E-Bike Rules

Whitefish is particularly interesting because the city’s current 2026 traffic code includes both Montana’s 20 mph electrically assisted bicycle definition and local Type 1, Type 2, and Type 3 terminology.

Whitefish Shared-Use Paths

Whitefish Code 6-1-11 expressly allows Type 1 and Type 2 electric bicycles on city shared-use paths.

They must be operated carefully and prudently, may not exceed 15 mph, and must yield to pedestrians and non-motorized bicycles.

The section expressly names Type 1 and Type 2, not Type 3. A Type 3 rider should therefore verify permission rather than assuming that the city’s shared-use-path authorization extends to a 28 mph bike.

Whitefish Sidewalks

Whitefish Code 6-1-12 expressly allows Type 1 and Type 2 e-bikes on most city sidewalks when operated in a careful and prudent manner.

However, bicycles and electric bicycles are prohibited on sidewalks adjacent to Central Avenue from Railway Street to East Third Street.

The Whitefish Trail Is Different

Do not confuse Whitefish city shared-use paths with the Whitefish Trail.

The Whitefish Trail’s current e-bike FAQ says e-bikes are not allowed on the trail. Much of the system crosses DNRC State Trust Land, where the trail is managed for nonmotorized use.

This is one of the clearest examples in Montana of why a bike can be permitted on a city path but prohibited on a nearby natural-surface trail.

Schools and Universities: Montana Campus E-Bike Comparison

Campus	Riding Rule	Parking, Storage, or Housing Rule
Montana State University – Bozeman	Personally owned e-bikes may be operated on pedestrian walkways, sidewalks, and designated campus bike lanes. PTDs must yield to pedestrians. Maximum speed is 5 mph in pedestrian areas and on sidewalks.	PTDs must use designated parking. Current policy says PTDs may not be parked or stored inside campus housing or other campus buildings because of battery and fuel risks. Registration is recommended, not mandatory.
University of Montana – Missoula	E-bikes and e-scooters may not be ridden inside university buildings. Current conduct rules allow them on sidewalks at reasonable speeds while requiring riders to yield to pedestrians.	UM Housing currently lists lithium-ion powered transportation devices, including e-bikes and electric scooters, among items not allowed in residence halls.
Montana Tech – Butte	E-bikes and e-scooters may be operated on sidewalks at reasonable speeds and must yield to pedestrians.	The current Residence Life Handbook says no motorized bikes can be stored inside residence halls or at residence-hall bike racks. Students should ask Residence Life where an e-bike may be stored.
Carroll College – Helena	General campus traffic and safety rules apply.	All bicycles parked or stored on campus must be registered. Housing rules allow bicycles in certain locations but separately prohibit use or repair of motorized or non-motorized vehicles inside residence halls. Confirm e-bike and battery storage directly with Housing or Campus Safety.

Montana State University E-Bike Rules

Montana State University in Bozeman has one of the most detailed current campus policies in the state.

The MSU Personal Transportation Device Policy was revised in February 2026 and specifically addresses motorized bicycles and e-bikes.

Personally owned e-bikes may be operated on pedestrian walkways, sidewalks, and designated campus bike lanes. Riders must yield to pedestrians.

The maximum PTD operating speed is 5 mph in pedestrian areas and on sidewalks. Elsewhere, riders must obey posted speeds and operate at a reasonable and prudent speed for the conditions.

PTDs must be parked in designated areas. The current policy also says PTDs may never be parked or stored inside campus housing or other campus buildings because of battery and fuel risks.

MSU registration is not mandatory, but the university recommends it to help with theft recovery and impoundment identification.

Violations can result in citations, impoundment, or other enforcement action.

University of Montana E-Bike Rules

At the University of Montana in Missoula, current student conduct provisions prohibit riding electric bikes and scooters inside university buildings.

They may be operated on sidewalks at reasonable speeds, and riders must yield to pedestrians. Failure to yield or follow campus traffic rules can become a conduct issue.

Students living in university housing need to pay particular attention to battery rules. The current UM Housing packing guidelines list lithium-ion powered transportation devices, including e-bikes and electric scooters, among items not allowed in residence halls.

For current conduct policies, check the University of Montana Community Standards office.

Montana Tech E-Bike Rules

Montana Tech in Butte states in its Student Code of Conduct that electric bikes and scooters may be operated on sidewalks at reasonable speeds and must yield to pedestrians.

The current Residence Life Handbook says that no motorized bikes may be stored inside the residence halls or at residence-hall bike racks.

Because that wording creates an obvious storage question for students who own e-bikes, I would contact Residence Life for the approved location before arriving on campus with one.

Carroll College Bicycle and E-Bike Considerations

Carroll College in Helena requires all bicycles parked or stored on campus to be registered with Campus Safety and Security. Registration is free and is good for the life of the bike.

You can review the requirement on Carroll’s Safety and Security page.

Carroll’s housing policies contain general bicycle storage rules, but they also prohibit the use or repair of motorized and non-motorized vehicles inside residence halls.

I did not find a sufficiently clear current e-bike battery-charging rule on the official pages reviewed, so an e-bike owner living on campus should confirm storage and charging directly with Housing or Campus Safety instead of assuming the ordinary bicycle-storage rule applies unchanged.

Who Controls E-Bike Access? Montana Land-Manager Comparison

Location or Land Manager	Which Rules Matter?	Practical E-Bike Takeaway
Montana public roads	Montana Code plus local traffic rules	A qualifying electrically assisted bicycle is treated as a bicycle.
City sidewalks and paths	State baseline plus municipal ordinances	Billings, Missoula, Great Falls, Kalispell, Whitefish, and other cities can be stricter.
Montana State Parks	FWP park rules, posted restrictions, and individual trail rules	Do not assume every trail allowing bicycles allows every e-bike. Montana State Parks do not require the Conservation License discussed below.
Other Montana state lands	FWP or DNRC rules plus property-specific motorized-use designations	A Conservation License is required for people age 12+ to access most state lands, but the license itself does not create e-bike trail access.
U.S. Forest Service	Forest Service travel-management designations and local decisions	The Forest Service manages e-bikes as motor vehicles. Check the current Motor Vehicle Use Map and local forest guidance.
BLM	BLM travel-management decisions	E-bikes can use motorized areas and OHV trails. Nonmotorized trails are not automatically opened to e-bikes.
Glacier National Park	National Park Service and Glacier-specific rules	Current Glacier rules allow qualifying e-bikes where traditional bicycles are permitted, subject to additional motor-use restrictions and one listed trail exception.
Yellowstone National Park	National Park Service and Yellowstone-specific rules	Current Yellowstone guidance expressly lists Class 1 and Class 3 e-bikes on designated bicycle routes and roads where allowed.
University campuses	State/local law plus campus policy	Speed, sidewalks, indoor storage, dorms, parking, and charging can all be regulated separately.

Montana State Parks and State Lands

Montana Fish, Wildlife & Parks identifies numerous state parks with bicycling opportunities, but its general biking information should not be read as a blanket authorization for every e-bike on every trail.

Check the individual park and trail before riding, particularly on natural-surface routes.

Montana Conservation License

There is also an access requirement that visitors can easily miss.

According to Montana FWP, everyone age 12 and older needs a Montana Conservation License to access most state lands for recreation, including biking.

The requirement applies to many fishing access sites, wildlife management areas, wildlife habitat protection areas, and state trust lands.

Montana State Parks do not require the Conservation License.

The license is an access requirement. It does not mean an e-bike is automatically authorized on every road or trail on those lands.

U.S. Forest Service E-Bike Rules in Montana

National Forest rules are substantially different from Montana’s road-traffic treatment.

The U.S. Forest Service manages e-bikes as motor vehicles for travel-management purposes. In general, e-bikes can use National Forest System roads and trails that are designated for the applicable motorized use. Local officials can evaluate additional e-bike opportunities through the travel-management process.

For example, Forest Service motor-vehicle-use materials for the Helena-Lewis and Clark National Forest expressly state that the Forest Service manages e-bikes as motor vehicles.

Before riding in the Bitterroot, Custer Gallatin, Flathead, Helena-Lewis and Clark, Lolo, or another National Forest, check the current Motor Vehicle Use Map for that exact area.

You can start with the Forest Service’s Motor Vehicle Use Map information.

BLM E-Bike Rules in Montana

The Bureau of Land Management uses another federal framework.

The BLM e-bike guidance says e-bikes can be used in motorized areas and on OHV trails.

BLM managers may separately authorize Class 1, Class 2, and Class 3 e-bikes on certain nonmotorized roads or trails through land-use planning or implementation decisions.

The important part is that the federal e-bike rule does not automatically open nonmotorized BLM trails. Check the local BLM field office or route designation before riding.

Glacier National Park E-Bike Rules

Glacier National Park uses its own federal e-bike definition and restrictions.

The current Glacier National Park bicycling guidance says electric bicycles are allowed if the motor is less than 750W and is engaged only while the rider is pedaling.

Bicycles are not allowed on Glacier’s hiking trails or in backcountry areas.

The current Glacier Superintendent’s Compendium says e-bikes are allowed where traditional bicycles are allowed, except for the Flathead Ranger Station Trail. Where public motor-vehicle use is not allowed, using the electric motor to move an e-bike without pedaling is prohibited.

Going-to-the-Sun Road

Going-to-the-Sun Road has seasonal bicycle restrictions that matter to e-bike riders.

For the 2026 season, once the road is fully open to vehicles and through September 27, bicycles are prohibited:

• Eastbound from Apgar to Logan Pass between 12 p.m. and 6 p.m.
• Westbound from Logan Pass to Apgar between 3 p.m. and 6 p.m.

Spring hiker-biker closures and road-crew restrictions can also change quickly, so check Glacier’s current road and bicycle information immediately before the ride.

Yellowstone National Park E-Bike Rules

Yellowstone provides another good example of a federal class system operating alongside Montana’s non-class state definition.

The current Yellowstone National Park biking page, last updated April 21, 2026, expressly lists Class 1 and Class 3 e-bikes as permitted on established public roads, parking areas, and designated routes when those areas are open to motor vehicles during the summer season.

All bikes are prohibited on Yellowstone backcountry trails, boardwalks, and oversnow routes.

Yellowstone also requires cyclists to ride single file on the right shoulder and limits bicycle riding to daylight hours.

Because the park’s current page specifically names Class 1 and Class 3, I would not assume another e-bike configuration is allowed without checking the current NPS rule.

Popular Montana Trails and Destinations

Whitefish Trail

E-bikes are currently prohibited on the Whitefish Trail according to the trail manager’s e-bike FAQ.

River’s Edge Trail – Great Falls

Great Falls specifically ties portions of its sidewalk bicycle rules to the River’s Edge Trail System. Check the current map and signs because the network includes both paved and natural-surface segments.

Mount Helena and Mount Ascension

Helena treats e-bikes as motorized for the open-space restrictions affecting Mount Helena and Mount Ascension, even though the same city guidance says this decision does not prohibit e-bikes on Helena streets and sidewalks.

Bitterroot Trail

The Montana Department of Transportation lists the Bitterroot Trail as a 47.3-mile asphalt trail between the Missoula and Hamilton area.

I did not find a single current MDT rule in the official material reviewed that settles e-bike permission for every portion of the corridor. Because a long trail can cross different jurisdictions and connect with locally managed facilities, check signs and the responsible manager for the segment you plan to ride.

Glacier and Yellowstone

Both national parks allow some e-bike use but follow federal park rules rather than simply adopting Montana’s bicycle definition. Check each park separately before your trip.

Visiting Montana With an Out-of-State Class 1, 2, or 3 E-Bike

If you are bringing an e-bike from another state, do not assume the class sticker alone determines your rights in Montana.

Class 1

A typical Class 1 e-bike provides pedal assistance up to 20 mph. It may satisfy Montana’s definition if the particular vehicle also meets Montana’s statutory requirements.

Class 2

A typical Class 2 e-bike can use a throttle up to 20 mph. Montana does not have a separate statewide Class 2 category or a statewide throttle prohibition within its electrically assisted bicycle definition, so evaluate the actual vehicle against Montana’s statutory definition.

Class 3

A typical Class 3 bike provides pedal assistance to 28 mph. Because that exceeds Montana’s 20 mph e-bike test, do not assume the bike receives the same treatment as a Montana-defined electrically assisted bicycle on state roads.

At the same time, some federal destinations use class terminology. Yellowstone currently lists Class 1 and Class 3 e-bikes, while Whitefish uses Type 1, Type 2, and Type 3 terminology in its municipal code.

The result is unusual but important: a manufacturer’s class label may matter greatly at one destination while not being Montana’s statewide classification system.

RV Travelers, Campers, and E-Bikes in Montana

Montana is a popular destination for RV travelers, campers, and people who carry e-bikes on motorhomes, trailers, and vehicles. The easiest mistake is assuming that arriving with a legal road e-bike means you can ride it on every trail near the campground.

Before unloading the bike, check:

• Who owns or manages the campground.
• Whether the road, paved path, or natural-surface trail has a separate e-bike designation.
• Whether a Montana Conservation License is required for the state land you plan to enter.
• Whether the campground or lodging property restricts indoor battery storage or charging.
• Whether a National Park, National Forest, BLM area, city park, or private trail starts near the campground.
• Whether seasonal wildlife, fire, snow, or construction closures are in effect.

Do not assume an available electrical outlet means e-bike battery charging is permitted. Ask the campground or property manager and use the charger specified for your battery.

Penalties and Enforcement

Montana’s bicycle rules are not merely recommendations.

MCA 61-8-601 states that doing an act forbidden, or failing to perform an act required, by the state’s bicycle, moped, and motorized-scooter traffic part is a misdemeanor.

Local and property-specific enforcement can differ:

• Billings publishes bicycle impoundment provisions.
• Whitefish says violations of its applicable traffic chapter may be handled as a misdemeanor or municipal infraction.
• MSU says PTD violations may result in citations, impoundment, or other enforcement action.
• Federal lands can enforce their own closures, travel-management rules, and park regulations independently of Montana city traffic law.

Because penalties vary by rule and location, I would not rely on a single statewide fine amount.

Real-World Montana E-Bike Scenarios

You Own a 20 MPH Commuter E-Bike in Bozeman

If it meets Montana’s statutory definition, it is treated as a bicycle under state traffic law. If you ride onto the Montana State University campus, MSU’s separate PTD rules apply, including its 5 mph limit in pedestrian areas and on sidewalks.

You Want to Ride on a Billings Sidewalk Downtown

Check the business-district boundary. Billings prohibits bicycle riding on sidewalks within its defined business districts. A rider under 16 is also subject to the city’s bicycle helmet rule.

You Own a 28 MPH Class 3 E-Bike

Do not assume the Class 3 sticker makes it a Montana-defined electrically assisted bicycle. Montana’s definition uses the 20 mph capability test. Determine the bike’s actual legal classification before relying on bicycle privileges.

You Want to Ride a Whitefish City Path

Whitefish expressly allows Type 1 and Type 2 e-bikes on city shared-use paths with a 15 mph maximum. Do not confuse that with the Whitefish Trail, where e-bikes are currently prohibited.

You Want to Ride Mount Helena

Helena’s open-space rule is the key issue. The city says e-bikes are treated as motorized for restrictions affecting Mount Helena and Mount Ascension.

You Want to Ride in a National Forest

Do not rely on Montana road law. The Forest Service manages e-bikes as motor vehicles for travel-management purposes. Check the Motor Vehicle Use Map for that exact forest and ranger district.

You Want to Ride in Yellowstone

Use Yellowstone’s current federal rule. The park currently lists Class 1 and Class 3 e-bikes on established roads, parking areas, and designated routes where permitted, while banning bicycles from backcountry trails, boardwalks, and oversnow routes.

Montana E-Bike Law FAQs

Does Montana recognize Class 1, Class 2, and Class 3 e-bikes?

Not as its statewide e-bike classification system. Montana defines an electrically assisted bicycle using the two-wheel and 20 mph performance test in MCA 61-8-102. Individual cities and federal land managers may use class terminology.

Does Montana have a 750W e-bike limit?

The current Montana electrically assisted bicycle definition does not state a wattage limit. Do not confuse that with federal land rules. Glacier, BLM, the National Park Service, and Forest Service policies can use a 750W definition in their own contexts.

Are throttle e-bikes legal in Montana?

Montana’s statewide electrically assisted bicycle definition does not create separate throttle and pedal-assist classes. Whether a particular throttle-equipped bike qualifies depends on whether the vehicle meets the state’s definition and the rules for the place where it is being ridden.

Are 28 mph e-bikes legal in Montana?

A typical 28 mph Class 3 bike may fall outside Montana’s electrically assisted bicycle definition because the state definition uses a 20 mph test. That does not by itself establish what alternate vehicle category applies. Check the particular vehicle’s specifications and legal classification.

Do Montana e-bikes need a driver’s license?

A qualifying electrically assisted bicycle is included within the definition of bicycle and excluded from Montana’s motor-vehicle definition, so the ordinary motor-vehicle driver’s-license requirement does not apply to it.

Do Montana e-bikes need registration or a license plate?

There is no state motor-vehicle registration or license-plate requirement for a qualifying electrically assisted bicycle. However, Montana law allows cities to create local bicycle registration and licensing requirements.

Do I need e-bike insurance in Montana?

Montana’s mandatory motor-vehicle liability insurance requirement does not apply to a qualifying electrically assisted bicycle. Optional e-bike, renters, or homeowners coverage may still be useful for theft and liability depending on your circumstances.

Do I need a helmet?

I did not find a statewide bicycle helmet mandate for a qualifying e-bike in the current state statutes reviewed. Local rules can differ. Billings requires bicycle helmets for riders under 16.

Can I ride an e-bike on a Montana sidewalk?

State law does not impose a universal bicycle sidewalk ban, but riders must yield to pedestrians, signal before passing, and obey prohibitory signs. Several Montana cities impose stricter rules.

Can I ride an e-bike on the Whitefish Trail?

No under the current trail-manager guidance reviewed for this update. That is different from Whitefish’s city shared-use paths, where Type 1 and Type 2 e-bikes are expressly permitted under specified conditions.

Can I ride an e-bike in Glacier National Park?

Yes in authorized bicycle areas if the bike meets Glacier’s current e-bike requirements. The park says the motor must be less than 750W and engaged only while pedaling, and e-bikes remain prohibited where traditional bicycles are prohibited. Check the current compendium for exceptions.

Can I ride an e-bike in Yellowstone National Park?

Yellowstone’s current page expressly permits Class 1 and Class 3 e-bikes on established public roads, parking areas, and designated routes when those areas are open under park rules. Bikes are prohibited on backcountry trails, boardwalks, and oversnow routes.

Do I need a Montana Conservation License to ride an e-bike?

If you are age 12 or older, a Conservation License is required to access most Montana state lands, including for biking. Montana State Parks do not require the Conservation License. The license does not override trail-specific motorized-use restrictions.

My Take

The hardest part of Montana e-bike law is not the statewide road rule. It is the transition between jurisdictions.

Montana itself still uses an unusual 20 mph definition instead of the Class 1, Class 2, and Class 3 system. Then a rider can move from that statewide framework into Whitefish, which does use e-bike types, onto the Whitefish Trail, which prohibits e-bikes, into a National Forest that manages e-bikes as motor vehicles, or into Yellowstone, which currently names Class 1 and Class 3 e-bikes.

That is why I would use three questions every time I ride somewhere new in Montana:

1. Does my bike actually fit Montana’s legal definition?
2. Who manages the place where I am about to ride?
3. What does that manager currently say about my exact type of e-bike?

For a 20 mph commuter e-bike used on ordinary streets, Montana’s rules are relatively straightforward. For 28 mph bikes, modified bikes, mountain-bike trails, campuses, open space, and federal land, checking the second set of rules is essential.

Legal Disclaimer

This guide is for general informational purposes and is not legal advice. State, city, campus, park, trail, federal-land, housing, and private-property rules can change or differ. Confirm current requirements with the agency or authority responsible for the place where you plan to ride.

If you find a Montana rule that may have changed, please use the Electric Bike Explorer Report an Error page so I can review it.

Official and Primary Sources

• Montana Code Annotated 61-8-102 – Definitions
• Montana Code Annotated 61-1-101 – Title 61 definitions
• Montana Code Annotated 61-5-102 – Driver licensing
• Montana Code Annotated 61-3-201 – Certificates of title
• Montana Code Annotated 61-3-301 – Registration and license plates
• Montana Code Annotated 61-6-301 – Motor-vehicle insurance
• Montana Code Annotated 61-8-601 – Bicycle traffic regulations and misdemeanor provision
• Montana Code Annotated 61-8-602 – Bicycle traffic rights and duties
• Montana Code Annotated 61-8-605 – Roadways and paved shoulders
• Montana Code Annotated 61-8-607 – Lighting, reflectors, and brakes
• Montana Code Annotated 61-8-608 – Sidewalks and bike lanes
• Montana Code Annotated 61-12-101 – Local traffic authority
• City of Billings – Bicycle laws and ordinances
• City of Missoula – Bicycle ordinance materials
• City of Helena – E-Bikes & E-Scooters
• City of Great Falls – Sidewalk ordinance materials
• City of Kalispell – Bicycle Code
• City of Whitefish – E-bike definitions
• City of Whitefish – Shared-use path rules
• City of Whitefish – Sidewalk rules
• Whitefish Trail – E-bike FAQ
• Montana State University – Personal Transportation Device Policy
• University of Montana – Community Standards
• University of Montana – Residence Hall Packing Guidelines
• Montana Tech – Student Code of Conduct
• Montana Tech – Residence Life Handbook
• Carroll College – Bicycle Registration and Campus Safety
• Carroll College – Campus Housing Policies
• Montana FWP – Conservation License
• Montana FWP – Biking
• U.S. Forest Service – Motor Vehicle Use Map information
• Bureau of Land Management – E-Bikes
• Glacier National Park – Bicycling
• Glacier National Park – Superintendent’s Compendium
• Yellowstone National Park – Biking
• Montana Department of Transportation – Local Bicycle Routes and Trails