This is the question everyone actually has, and the honest answer is: it depends on your state, your city, and sometimes the specific park you're standing in.
That's frustrating, so here's how to get to a real answer quickly instead of reading forum arguments from 2019.
The general shape of the rules
Across most of the US, it usually works out something like this. Treat it as a starting point to verify, not as permission.
Roads and bike lanes
Generally yes, for all three classes. An e-bike that meets the legal definition of a bicycle is treated like a bicycle: same right to the road, same obligation to follow traffic law.
This is where Class 3 makes the most sense, and where the 28 mph assist stops being a novelty and starts being genuinely useful.
Multi-use and paved bike paths
Usually Class 1 and 2 are fine. Class 3 is frequently not. This is the single most common restriction in the country — a lot of states specifically exclude Class 3 from shared paths, because 28 mph past a family with a stroller is a bad mix.
Some paths ban throttles too, which puts Class 2 out.
Natural-surface trails and singletrack
This one is genuinely case by case, and it's usually decided by the land manager rather than the state. Some trail systems welcome Class 1 e-MTBs. Some allow them on some trails and not others. Some ban all e-bikes.
Federal land is its own layer: National Park Service and Bureau of Land Management units set e-bike access per unit, so the answer can change when you cross an invisible boundary in the woods.
Sidewalks
Usually no, and this one is often a city ordinance rather than a state law. Riding a 50-pound bike at 20 mph past shop doorways is exactly the behaviour that gets e-bikes banned from places, so this is worth respecting even where it's technically allowed.
How to find the actual rule in five minutes
Rather than trusting a general article — including this one — here's the fast path to the rule that applies to you:
1. Search "[your state] electric bicycle law" and look for the state DOT, DMV or legislature page. Not a retailer's blog. The state page will tell you whether your state uses the three-class system, and what each class is allowed to do. 2. Check the age and helmet lines specifically. These vary a lot. Minimum ages of 16 for Class 3 are common, and several states require helmets for Class 3 riders of any age. There's more on picking one in choosing a helmet. 3. For a specific path or park, find the land manager. City parks department, county open space, state park, NPS unit — whoever's name is on the trailhead sign. Their site or their posted signage is the authority, and it overrides your general state rule. 4. Read the sign at the trailhead. Genuinely. It's the most current source and it's right there.
The things that catch people out
- Rules change at the boundary. A path can be legal for its whole length and then cross into a park with different rules. Nothing tells you except a sign.
- "E-bike friendly" often means Class 1 only. Worth checking rather than assuming.
- A derestricted bike is not the class on its sticker. If it's been unlocked past 28 mph, it may not be a bicycle in the eyes of the law at all, which changes everything about where you can take it and what happens if you're in a collision.
- Throttle bans are separate from class bans. Some places allow Class 2 speeds but not throttle operation on paths.
- Local ordinances can be stricter than state law. Cities can and do add their own rules, particularly about sidewalks and beach paths.
Ride like you want access to continue
The legal answer isn't the whole answer. E-bike access to trails and paths is still being decided in a lot of places, and it gets decided largely by how the current riders behave.
Slow down around pedestrians. Pass wide and say something before you do. Don't blast past horses or kids. Yield uphill. When a path is busy, ride like the assist isn't there.
Every rider who rips past a family at 25 mph on a shared path is making a small contribution to the sign that eventually says "no e-bikes." Every rider who slows to walking pace past a toddler is doing the opposite. There's a broader version of this in riding in traffic and in the community guidelines.
When in doubt
If you can't find a rule and there's no sign, Class 1 behaviour on a shared path is almost never the wrong call: pedal assist, moderate speed, courteous passing. Nobody has ever been thrown off a trail for going too slowly and being polite about it.