We have these in Whitefish Montana - it's foggy most of the time here which provides the moisture to create them.

https://skiwhitefish.com/ski-among-the-snow-ghosts-at-whitef...

I've thought these frozen and snowed trees are common in all mountains.

Yes they are, you just need brutal enough weather with strong winds and can see this few times a year

Non-AMP link: https://www.elitejetsetter.com/snow-ghosts-big-white/