Your shot reminded me of one I took at the same location last spring, within a week of getting my first decent camera in about 25 years. I was going for something slightly different and didn't execute it as well as you, either in the exposure or the processing. But you can see the similarities...
<a href="http://www.flickr.com/photos/20889767@N05/4941611795/" title="Rock Center by ramboorider1, on Flickr">
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"1354" height="1050" alt="Rock Center" /></a>