A youtuber, Whit Meza, posted riding some of them, and the farm my family homesteaded is on a Rustic Road in Washington County. It was a real treat to see her ride by it and so many other things in the surrounding area that I remember from trips "home".
It was her goal to finish it, but I don't recall if she ever did. She got into long distance stuff, doing a couple Iron Butts and a 48/10 challenge this year.