Hi Michael, Nice conversion and interesting scene. For my taste I would crop out most of the bush on the left.The clouds are very strong but I'm wondering if the verticle cloud is smoke?
I'm not sure I'd crop the bush on the left but I would try to bring up a little more detail in the black center area of the bush. I'm fine with the contrast - I think it's another stunning image. You've got me homesick for the canyon now...