Via Rail, Canada's Passenger Rail System, offers routes from across Canada to Montreal. For example if you want to travel from the Midwest you can go from Sarnia or Windsor, Ontario and travel through Toronto to Montreal. Via Rail is also a great way to get from Montreal to places like Toronto, Niagara Falls or Quebec City if you are going for a pre or post conference trip. See http://www.viarail.ca/en/trains/ for more info.