This area is very fortunate to have a healthy network of gravel roads you can connect to make a loop. The foothills gravel is characterized by lots of up and down (and a bit steeper than the paved variety). 3 Segments typify this: Burches, White Mountain, and Castle Rock. Luckily on the trainer you don’t have to brake for the dusty turns before heading up the next kicker! If you like this - try the 2 part Crozet Gravel North loop