Limestone specifically
![](https://cimg2.ibsrv.net/gimg/bikeforums.net-vbulletin/1024x765/6a00e552358ec4883401b8d1971379970c_ccac0a649d980ee177420200884f11daf7228163.png)
I'll be sure to refer to my bike and usual outings as "Crushed Rock" riding.
Picture pulled from DOT website because my phone's camera is dumb and honestly this is what anything off pavement looks like in Iowa. Unless you're on a class B dirt road that is literally just dirt.