Personally I would say YES!. I have heard that they appear in the sky as lenticular clouds all the time. I didn't know until recently that they "ships" had the ability to do this. I would be more readily able to believe this than I would seeing a bunch of dust particles and thinking they were light beings as I read somewhere in another post. :-)
I've read many Mysterious events happen in the mountains.
yep yes sir that's ufo!