I wonder if that could be Tiffany Mountain on the horizon at center. Tiffany is just about due west of Copper Butte. However, Mt. Bonaparte is also due west and pretty high. Hmmm? I think maybe that is Bonaparte.
One thing to consider is that I'm not certain that the shot was taken due west, since I didn't get out my compass! But I really don't have any idea what that is, except that I did think of Moses Mountain. ???