Assuming the OP is a troll, many others will read this and still want the same info. Not hard to dope out where I ride, but here is the gist of it.
Since day one on an e bike, in 2008, I've ridden on trails more or less illegally depending on what the sign says. All city multi use trails are posted no motors period. Yet I've stopped and chatted with bicycle cops on these trails, and had no mention of my bike being motorized. On the blm trails, they are posted no motor vehicles, yet again, I have never had a bad encounter with the local MTB riders. On the blm trail, my lower power trail e bike is still a motor vehicle in my state. It would not be a motor vehicle in other states.
HOW THE HECK DO I DO THIS? Really quite simple, I don't ride like a dick, and with a long white ponytail, don't fit the jackass teenage e bike rider profile at all. I do ride higher powered bikes at times, but NEVER haul ass on the multi use trail, or use enough power to tear up the MTB trail. So am I a poacher? Yes, I am, but I dont endanger anybody or cause excess wear on the mtb trails. And so I am tolerated, even welcomed.
Now, if only we could get horse riders to stay of the mtb only singletrack....
Anyplace illegal to ride motors will be posted. But some places say no motor vehicles, other say no motorized vehicles. If it says no motor vehicles and your vehicle is defined by state law as a bike, you can ride it there. And you might get ticketed by a cop that doesn't under stand the law too.
Local rules always, there is no such thing as a national law on where you can ride e bikes. Only national definitions of what can be sold, as a " Bike" .
Local rules and how they get enforced get a lot more strict, the higher the use of the trail. Don't go to Sedona, and try to ride your e bike on the trails, for one example.