In Fernie it's a different matter though and I hear it many times throughout the day. It hasn't really bothered me although I already know to watch my timing in church so I am prepared to pause when it passes through. I learned, when querying why it blows here, that the train conductor's blow the horn/whistle as a warning and safety precaution to try to prevent collisions with vehicles, people etc...
Admittedly it's very possible that it'll drive me nuts from time to time as I spend more days listening to it but on the whole I think it's a great sound, and even though it's not distinctive to the mountains it does strike me as fitting for this mountain community. As is the picture it creates winding down the tracks here.
What a breathtaking community - including the train whistle.