Can You Help Identify These Photos?

Steve Bixby of Missoula recently purchased a box of glass negatives at auction. Some of them were not labeled. He emailed these four photos to the state historical society, hoping to find out where they might have been taken. The only clue we really have is that all of the photos he has identified were taken around southwestern Montana. If you can help Steve out, let me know and I'll put you in touch.