You can find these in western Canada too: https://www.elitejetsetter.com/snow-ghosts-big-white/amp/
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/