Montana eBike Laws (2026)
Last verified against state law and agency sources on August 1, 2026. Framework: Single-tier definition — no three-class system.
Montana has not adopted the three-class framework; SB 387, which would have done so, died in 2025. Instead MCA § 61-8-102 defines a single "electrically assisted bicycle" — a two-wheeled vehicle with an electric motor that cannot propel a 170-pound rider faster than 20 mph on a level paved surface — and treats it as a bicycle. That means no driver's license, no registration, no insurance, no statewide helmet requirement at any age and no statewide minimum riding age. Billings is the only Montana city with a bicycle helmet ordinance (under 16). Because there is no state class system, trail managers in places like Bozeman, Whitefish and the Bitterroot make their own calls, and faster machines may fall outside the bicycle definition entirely.
Recent & pending changes in Montana
- 2025 — SB 387, which would have adopted the three-class system, failed. Montana still uses a single 20 mph definition.
⛑️ Helmet
No statewide requirement; Billings requires helmets under 16
🔞 Minimum age
No statewide minimum age
📋 License & registration
Not required
🚲 Classes recognized
Single "electrically assisted bicycle" definition capped at 20 mph
Where you can ride in Montana
Where bicycles are allowed. Trail systems, state parks and Forest Service districts set their own eBike rules.
State law sets the floor. Cities, counties, park districts and federal land managers can all be more restrictive — check posted signs and the managing agency before riding an unfamiliar path or trail.
How Montana classifies eBikes
Montana does not use the standard three-class system. Single-tier definition — no three-class system.
Single "electrically assisted bicycle" definition capped at 20 mph
A bike marketed as "Class 3" elsewhere may not fit Montana's definition of an electric bicycle at all — read the state summary above before buying. See eBike Classes Explained for what the class labels mean nationally.
Frequently asked questions
Are eBikes legal in Montana?
Montana has not adopted the three-class framework; SB 387, which would have done so, died in 2025. Instead MCA § 61-8-102 defines a single "electrically assisted bicycle" — a two-wheeled vehicle with an electric motor that cannot propel a 170-pound rider faster than 20 mph on a level paved surface — and treats it as a bicycle. That means no driver's license, no registration, no insurance, no statewide helmet requirement at any age and no statewide minimum riding age. Billings is the only Montana city with a bicycle helmet ordinance (under 16). Because there is no state class system, trail managers in places like Bozeman, Whitefish and the Bitterroot make their own calls, and faster machines may fall outside the bicycle definition entirely.
Do I need a helmet to ride an eBike in Montana?
No statewide requirement; Billings requires helmets under 16 in Montana. Helmets are strongly recommended for every rider regardless of the legal minimum.
Is there a minimum age to ride an eBike in Montana?
No statewide minimum age in Montana. Local governments and land managers can set stricter rules than the state.
Do I need to register an eBike in Montana?
Not required. A compliant eBike is treated as a bicycle in Montana rather than a motor vehicle.
Where can I ride an eBike in Montana?
Where bicycles are allowed. Trail systems, state parks and Forest Service districts set their own eBike rules.
Sources for this page
- MCA § 61-8-102 — Definitions (electrically assisted bicycle)
- PeopleForBikes — Montana eBike law handout (PDF)
This page summarizes Montana law for riders and is not legal advice. Statutes and local ordinances change — verify anything you rely on with the state or the managing agency. Spotted something out of date? Tell us and we'll re-check it.
Related eBike Guides
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Browse local dealers, compare brands, and find shops near you. Local shops are usually the fastest way to confirm which classes are allowed on nearby paths and trails.
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