The portion of the San Juan Mountain around Telluride is certainly one of the most beautiful areas in Colorado.  When I was there, in the last week of September, the changing Aspens were brightly intense and dense.  The views from the roads were spectacular. When I arose on the day I was to return, there were no clouds and deep blue skies.  I took a side trip to Ouray and drove to Yankee Boy Basin where I could see Mount Sneffels and Blue Lakes Pass from the other side.