If one old train looks pretty much like another to you, you are probably wasting your time (and considerable money) visiting here. If you have some interest (and you can always find something interesting here), you can do it in a couple hours. If you are somebody interested in trains, or especially a KID interested in trains, it may take you 3 or 4 hours. The assortment of trains was considerable-- six long tracks inside and 4 outside, plus two fully outfitted "sidings"-- assorted ancillary railroad equipment, a big model train layout, and an extensive old "main street" of shops typical of the age. There is some unique equipment, like a rolling log loader and a segmented, 128-ft. engine that was just huge. The snowplow videos (two of them) were downright exciting, don't miss them if you go. You can't go in many of the cars, but enough, I think, or you would be there all day.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.