Interesting. 89.1 Radio Canada (CKSB-9) from Fort Frances, a 50 kW station, makes it into Duluth about 150 miles away on most summer nights, albeit with a weak signal. (If I hear anything else on 89.1, I get very excited). The station relays Winnipeg's CKSB, an AM station, and is very much unlike anything on American radio.
I think I've heard Espace Musique from Thunder Bay driving down WI 13 on the South Shore of Lake Superior. Very odd format.