Near Lake Placid (2.5hrs south of Ottawa), you can ride the rail on rail bikes at Rail Explorers USA.
There is a chance that this unique attraction may not exist next year because the government and local groups are considering alternative uses for these tracks.
Given that the steam train will no longer be using the tracks up to Wakefield, this may be a good tourist option for the old tracks.
The image was taken from the Rail Explorers USA gallery.