The Lincoln Highway never went through Michigan at all of course but it's a good starting point for this years tour. This is something I've always dreamed of doing, if only I had the time...and a classic car...and the money! The annual conference will be in Ann Arbor June 22-26 and the tour will leave from the Packard Proving Grounds June 27. Here are a few relevant links:

http://lincolnhighwayassoc.org/tour/2015/

http://indianalincolnhighway.org/lha2015