When I was in Telluride I went for a fifteen mile six-hour hike up and over a 13,000 pass on a trail called the Wasach Trail. The air was thin but it was exhilirating. Especially since it was such a beautiful day.
A few of the photos from the hike can be found at my photo site here.
This site from a "Neuromorphic Engineering Workshop" has some good photos of the hike too.
