Monarch Pass on Colorado US 50. Icy conditions almost resulted in catastrophe. After we topped the summit (11,312 ft) and started down the other side we saw a red faced woman walking in the snow beside the road and waving her arms. While she was telling us about the truck jackknifed across the road just around the next bend, another car almost slid into us. We made it back to the top where I spent the next hour waving down cars to warn them of the blocked road. After the emergency vehicles showed up, we turned tail, went back down the way we came, and headed south, to cross the divide on 160 over Wolf Creek Pass.