I went thru San Juan Valley National Park this morning. Hwy 160 in Southern Colorado. Rather beautiful. I left early while it was still pitch dark, and by the time I got to the foot of the mountain, sun has risen enough to color the tip of the mountain golden color.
The route itself is rather twisty, but not overly so. Would be a good route to take if you're on a bike, I think. Cliffs are numerous enough to provide some andrenalin boost. The overall state of towns are old, quaint small town. I saw some impressive classic style housing along the way.
There's only one thing that bothers me: smog. Not from the towns nearby. Probably gathered around from all over state. It's not bad, but I was expecting clean mountain air.