Only one I've ridden that I know of was the Copperhead Loop in October 2019, US 276/NC 215, total of 92 miles Waynesville to Brevard and back. Lots of fun and as much great scenery-riding as twisty-riding
I have ridden those roads many times but never heard it called the Copperhead Loop. Is there a T shirt? It's not a T shirt road unless someone is selling a t shirt with the road name on it.