Snyder2101

One of the first movies I remember was a film starring Stanwck and McCrea and I believe Walter Brenan. It took place on a river and I think McCrea sang a song "A cow was on the RR track, train was coming fast, cow jumped the RR track to let the train go pass". I can't remember the title and a search of both their names didn't reveal it. Is there anyone old enough to remember this title? Thank you.