Trail 80 is always miserable. It looks good on a map, but is the most horsed out trail around. 90 is some gravel, some dirt horse path. It is not as traveled as 80 and was fairly frozen first thing in the morning and very rideable.
I hit Callahan early, so it was really not in bad shape. We were the second set of tracks on it, so it had not been ridden much. It was pretty comparable to Nebo as far as condition.