But I bet cityfolk have a reeeeeeaally different notion of "road" than is meant here.
Take the Trinity Alps complex for example. It's got, still to this day, my least favorite approach ever. You go way up the north coast, then along 299 (if I remember right), then through a reservation, and then you get on this lovely little road that's several miles of 15-mile-an-hour white-knuckle less-than-single-lane rough gravel, with steep granite on one side and a drop straight down to a river on t'other, and a whole lot of blind corners. You do that for a while, then you see the yellow sign posted that says, "Road Narrows", and whaddaya know, it sure as heck does.
It's a road that started as a trail and never really had any ambitions beyond that.
There are a ton of logging roads and fire cuts all over the place too. Lots of dusty hill climbs. Other rarely-trafficked routes where the macho advertising for your 4WD meets a grim reality.
Maps aren't necessarily current, either. I once bailed off the Wonderland Trail in Rainier after a partner took a bad fall. According to the map and the GPS, there was a road just a few miles out that led to a paved road that led to civilization. Great. Well, we get there, and after swimming through dense, wet vegetation for a while, start finally seeing signs that, yeah, there was a road there, about a hundred years ago.
18 miles as the bird flies can easily turn into two days' hiking in some of that terrain, too.