Kebler Pass west of Crested Butte, Marshall Pass from Poncha Springs to Sargents (both gravel roads for TVs or toads only), Lake San Cristobal at Lake City, and CO 62 from Ridgway to Dallas Divide are our favorites. But, after the fall color we had in 2016, our new favorite for "late fall" color (1st weekend in October) is CO 17 over La Manga and Cumbres Passes between Antonito and Chama. If NM is still shut down by then, you can camp on top of Cumbres Pass (still in Colorado) at the USFS Trujillo Meadows campground. Or lose a little elevation by backtracking to one of my favorite USFS campgrounds in Colorado--Magote (NOT private Mogote Meadows!)--on CO 17, 16 miles west of Antonito. It has several miles of fly fishing access to the Conejos River.