@Kep01 , I've done the bulk of the more famous TAT sections such as those west of Lake City. Most of the rest are largely dirt roads.
One interesting section that I haven't done is Hancock Pass which is just west of Salida / Buena Vista. We had hoped to do that at the June Jam, but it wasn't yet cleared of snow. (I've since seen notice that it is clear now.) Hancock Pass difficulty is rated similarly to Imogene Pass. More info on it here:
Hancock Pass - Colorado Offroad Trail
Having said that, I am aware of different TAT routes through Colorado so lets be sure we're on the same page. Here's a Gaia screen shot of the orange TAT route I have through Salida. Does yours match this? Salida is right in that u-turn at the south end:
photos.app.goo.gl