It is Highway 143 and according to some sources is one of the most scenic highways in America. Since it is not big rig friendly we won't take that route, we were considering 14 which I didn't think look to bad travelling West to East so we might have to have another look at it. According to the Mountain guide that I have there are only a couple of stretches that are 6-8% grade one of 3.5 miles the other of 4 miles. We have an exhaust brake so I thought that it might be Ok, I would like to here what others think.