88 gets my vote. From Jackson to Woodfords it doesn't stop. 4 is up there too, just because the narrow, no shoulder, serious drop off, death defying route East bound is such a breath taking experience. It links easily with 89 East (South?) bound for some serious vistas. 108 just goes on and on. Serious fun overload. And the northern most day trip is 70 over the top.
49 to it's northern terminus is incredible too... go to 89 and turn around. Two completely different rides. I'll do the 49 route with you. Been needing to get up there again.
LOL, I guess it's easier to just pick a number and go. Can't go wrong. ::26::