This won't really be much of a clue, but while looking at a nearby area on Google Earth today, I noticed that when yesterday's unknown mountain is viewed at a low angle similar to the photos I took and from the same locations, that it really looks identicle. I didn't know that you could get such realistic 3-D effects from Google Earth at such a low angle. I didn't know one would be able to find this mountain with Google Earth.
Another minor hint. This mountain can be seen for miles.