I believe this was a made for tv movie that i watched probably in the late seventies or early eighties.  It was western themed, similar to Grizzly Adams, with a similar story line.  The man was forced to leave his wife’s (or girlfriend’s) ranch for a crime he was framed for by some other dudes.  The man escapes into the mountains.  Somehow there is a contest or something which is supposed to be impossible to win.  The contest entails finding a lost train steam locomotive which was buried on the mountain and bring it back to town.  The man finds the locomotive and digs it out by diverting a stream and then tows it down the mountain with a horse and sled.  He wins the contest and his freedom.