I've driven a few of these routes myself, though not during the month of February. Keep an eye on the weather, as it can always call you to change your routing!

Do you have an EZ-Pass? You could go up I-70 to the PA Turnpike (70-76), to I-80/90 and cross on I-80 as you have mentioned. It isn't nearly as high in elevation but its weather could be a lot different than going I-70 straight across to SLC and south on I-15 into Provo. However, the route through PA, OH, and IN is toll road (which is why I asked about EZ-Pass).

Going I-70 to I-68 to I-79 and up to I-70 and across is comfortable until Denver. You could go north at Kansas City on I-29 up to I-80 if you'd prefer not to climb over 11,000 ft pass. However, as pointed out above, it's gorgeous, the climbs are fairly easy if you're not towing anything, curves are gentle and the downgrades good too. The ski areas will be beautiful, and Glenwood Canyon is an engineering marvel!

Either way, allow for 4 days driving (3 overnights), and have an extra in case winter blows in again and you have to either stop or "go around".


Donna