Belated thanks for the list! Here's a brief ride update for Hillsboro Cty: Meadow rd, New Boston: Almost entirely within a military reservation, with scary signs and heavy fences blocking the road. Don't bother. Laurel Rd, New Boston: Potholes, packed dirt, lots of houses. In theory the road runs up beyond the last house, but the way it's laid out you have to pretty much ride onto their property. Got to the last house, didn't try to go further. This one can be done on just about any bike. Old County Rd, New Boston: The real deal. No maintenance, lots of exposed rocks and roots, slippery loam under leaves. I had to eventually turn back when I reached a section of 2-foot deep thick mud (paste, not soup). Knobbies pretty much mandatory; not for road-oriented ADV bikes. I barely made it out on my OEM tires after lots of wheelspin and complaints from the traction system (which I eventually just turned off), and afterwards found that I had tweaked the forks too, even though I never hit anything major. Map says it dead-ends at a marsh about 1/4 mile beyond the point where I turned. Note: there is private property on one side of the lane and conservation land on the other. There were a lot of SxS and dirtbike tracks in the mud so there must be some other outlet.