My rides lately have been short and local. Bear Creek Canyon is pretty clean, but kinda short. We could do laps on it! [laugh]
285 is clean all the way to Park County, but BORING and full of speed traps.
The roads up through Nederland and Ward were just starting to get dirty when I last rode them - about a month ago.
36 to Estes and Big Thompson canyon back might be clean as they are well traveled.
How is the road to Deckers? I see some folks rode down there recently.
I honestly think that riding in the fall/winter in CO is totally do-able, but you have to be ok with dressing warm and riding more conservatively. And taking breaks to warm your hands with pizza and coffee.