Here's a photo of a town you've probably never heard of ... and one that really doesn't exist anymore. Mill Iron, Montana was in far northeastern Carter County, out in the middle of some surprisingly lovely countryside. The post office there was established back in 1916 at the height of the eastern Montana homestead boom, the site named in honor of a large Texas cattle ranch.
Mill Iron probably never had much more than a post office, store, and school, and this old roadhouse was about the last of the place. I imagine it closed about the time the post office was discontinued in 1990. When I went through there about four years ago, most of the equipment for a little cafe was still inside ... waiting for the revival that will never come.