Originally Posted by OKlr
not from the gpx file. you could go old school and look at the county maps. They were posted earlier. I've used them while making the trail. it shows what kind of road each is, paved, graded dirt, unimproved.
I put the tracks into google earth. You can then "fly it" to get an idea of the road surface. It's pretty easy to tell but does leave some sections that are not readily definable.