This summer I rode to Coldfoot only and turned back. (On my Cbr)
From Fairbanks to the beginning of Dalton--- all paved , which is about 81 miles.
From te beggining, you'll hit packed dirt road... And then you occasionallyhit some stretch paved road. They'll usually run
For about half a mile or sometime usually longer. . Once you
Passed the Yukon stopped, it's another 60 miles till the Famous "artic circle " sign.
From there , it's all paved for another 60 miles till Coldfoot.