You can see my response in the earlier thread. CO 13 is easier but less scenic and further out of the way between GJ and Vernal.
If you do go CO 139, check out the links I gave in the previous thread.
Ken & Allison
2 Camping Cats (1 diabetic)
1996 4Runner, TRD Supercharger, Edelbrock headers
2007 Fleetwood Arcadia, Honda EU2000i
4 mountain bikes, 1 canoe, 4 tents, 8 sleeping bags, 2 backpacks
(You get the idea!)