I visited the Northwoods of Wisconsin and Michigan's UP this summer. I found it intriguing that the area was, formerly, well served by passenger service. At one time this was for deforestation, along with the logging industry. Eventually, recreational fishermen found the area for weekend getaway trips. And, then, it became a summer vacation spot for Chicago and Milwaukee-ites.
As aforementioned, the last of passenger service was in the late 60s on C&NW. I heard an interesting story as to how this station in Eagle River, WI once had connecting steamboats which met the train and carried passengers along the chain of lakes to their final destinations.
I also met a man who first journeyed to the area around 1940 via the Milwaukee Road. He offerred interesting stories about that trip, abandonment of the line during WWII, and discoveries of site excavation when the depot area was redeveloped.