At the peril of opening another can of worms (see TransitBiker's link), I am astounded that people are surprised by ice in the winter time. It is still deep winter in the mountains, Colorado Kid, and if you are going to go riding a bike in the mountains, you should expect to see ice especially in shaded areas. I suspect, given long experience with the Colorado mountains, that the temperature was near freezing or had been so overnight. In other words, perfect conditions for water to freeze.

Most people don't go riding in the mountains this early for a reason. Stick to the plains for a little while longer or learn to recognize the signs of ice. If the road looks wet and the temperature is near freezing and/or the wet road is in the shade, expect ice and proceed accordingly.