Montana
Last updated
Montana is one of the last states without a Class 1/2/3 system: Montana HB 261 (2023) and Montana SB 387 (2025) both died trying to create one. One sentence in MCA 61-8-102(7) does all the work instead: if the motor cannot push a 170-pound rider past 20 mph on level pavement, the machine is a bicycle. That means no license, no registration, no insurance, no statewide minimum age, and no statewide helmet rule at any age, though Billings requires riders under 16 to wear one. The definition draws no throttle line, so a throttle bike qualifies as long as it cannot pass the 20 mph test, while a 28 mph pedal-assist bike fails it and falls toward Montana's moped rules.
A qualifying e-bike carries full bicycle rights and duties on Montana roads, and MCA 61-8-608 lets bicycles ride sidewalks statewide with pedestrian duties and an audible signal before passing, though Missoula bans e-bikes on downtown sidewalks and Bozeman bars riders over 15. Shared-use paths are open where bicycles are; with no statewide default-access rule, each land manager decides trail by trail. Montana FWP has no formal e-bike policy for state parks, so ask the park manager, while DNRC trust lands treat e-bikes as motorized vehicles, open roads only. Glacier allows e-bikes under 750 watts wherever bicycles go, motor engaged only while pedaling, and USFS and BLM treat e-bikes as motorized unless a trail is specifically designated. A motor that can push a 170-pound rider past 20 mph takes the machine out of the bicycle definition and toward Montana moped or motorcycle rules, license and registration included. Our Montana bicycle and e-bike insurance page pairs these rules with the state's best rides, riding season, and events. The full breakdown is below.
Montana E-bike Laws
No classes, just one sentence: if the motor cannot pass 20 mph, it is a bicycle. Here is where Montana stands on e-bikes.
Montana is one of the last states without a Class 1/2/3 system — Montana HB 261 (2023) and Montana SB 387 (2025) both died trying to create one. One sentence in MCA 61-8-102(7) does all the work instead: if the motor cannot push a 170-pound rider past 20 mph on level pavement, the machine is a bicycle. No license, no registration, no insurance.
Not a category in Montana law, but a 20 mph pedal-assist bike fits the state's single e-bike definition and rides as a bicycle.
Montana's definition draws no throttle line — a throttle bike qualifies as long as the motor cannot push a 170-pound rider past 20 mph on a paved, level surface.
A 28 mph pedal-assist bike fails MCA 61-8-102(7)'s 20 mph capability test and falls toward Montana's moped rules, with the license and registration those carry.
A qualifying e-bike is a bicycle under MCA 61-8-102(2), outside Title 61's driver-license regime.
Bicycles are excluded from Montana's motor-vehicle definition (MCA 61-1-101) — no plate, no title, no MVD visit.
Montana's mandatory-liability statute reaches motor vehicles only — coverage for a crash is on you.
Montana sets no minimum age for any e-bike; with no class system, there is no under-16 Class 3 rule to apply.
No Montana helmet law for bicycles or e-bikes at any age; Billings requires riders under 16 to wear one (Billings Sec. 24-605).
Where You Can Ride
- Roads & bike lanesA qualifying e-bike carries full bicycle rights and duties on Montana roads (MCA Title 61, chapter 8).
- Shared-use pathsOpen where bicycles are; the statewide default-access rule died with Montana SB 387, so each land manager decides trail by trail.
- SidewalksMCA 61-8-608 lets bicycles ride sidewalks statewide with pedestrian duties and an audible signal before passing; Missoula bans e-bikes on downtown sidewalks (Ordinance 3638) and Bozeman bars riders over 15.
- State parks & trust landsMontana FWP has no formal e-bike policy — ask the park manager; DNRC trust lands treat e-bikes as motorized vehicles, open roads only.
- National parks & forestsGlacier allows e-bikes under 750 watts wherever bicycles go, motor engaged only while pedaling; USFS and BLM treat e-bikes as motorized unless a trail is specifically designated.
- Out-of-class e-motosA motor that can push a 170-pound rider past 20 mph takes the machine out of the bicycle definition and toward Montana moped or motorcycle rules, license and registration included.
Effective as long-standing law (current through the 2025 MCA) under MCA 61-8-102's single-tier e-bike definition; Montana has no three-class statute (Montana HB 261 of 2023 and Montana SB 387 of 2025 both failed). Statutes: MCA 61-8-102(2) and (7), 61-1-101, 61-8-608; Missoula Ordinance 3638; Billings Sec. 24-605. Cities and park districts can add their own path and trail restrictions — check signage where you ride. Last reviewed July 2026.