Looks like the OP has decided to take a southern route and I would agree. I70 over Vail Pass and the Eisenhower tunnels in the winter can be an unhappy experience. All it takes is one commercial vehicle without chains or a private vehicle with questionable tires trying to get to a ski area or home afterward to spin out and the road may close for hours. Then you sit and hope that you don't run out of fuel in the backup that can go for miles. Tow companies and body shops make a lot of money in the winter here.
