I can tell you that most of the trails in Arcadia management area are off limits to motorized vehicles. Hikers, horses, and mountain bikes only.
There are some dirt roads in Arcadia that are open to motorized vehicles, but they are not challenging in any way, just flat wide maintained dirt roads.
All the trails that are fun in a dirt bike in RI are either private land or state owned and off limits to motorized vehicles.
So with the exception of organized rides ( google Rhody rovers, or NETRA), nothing like the Pachaug in RI.
I wish the RI would license some some state owned land for motorized recreation and have a tag system to pay for it,
Isn’t that how it works in Mass and CT? You pay a fee and get a sticker to ride in the designated areas?