This is the old Parker Homestead in Three Forks, Montana. It was closed when we arrived this morning so I couldn't get any closer than this. It used to be a state park so when I check on it this afternoon, this is what I found about it -
The cabin was built around the turn of the century by Nelson Parker and his wife Rosa Hardwood, who came to Montana from Utah in the late 1800s. The homestead was used through at least the 1940s before becoming a state park in 1985.