One of the Collegiate Peaks (Harvard I believe), just south of Buena Vista, CO.
Make sure to check out 'Majestic Peaks' On Black. Lots more detail and much better on a dark background.
This image made the Flickr Explore page on July 27th, 2006!
Image #437 for that day.
This image is available for sale from my website:
Or via the direct link here.