Only Alaska has more:
What state has the second most shoreline including lakes?
Minnesota has the most shoreline of any other of the lower 48 states with almost 90,000 miles of freshwater shoreline, according to 50states.com. I’m assuming this is counting the shoreline of all of the approximately 10,000 lakes.
Thanks to one guy that did some extensive research about lake shorelines in the U.S., we can say that Minnesota comes in second for most shoreline including lakes. The state is obviously landlocked and has no coastal shoreline but that doesn’t matter when you factor in the 10,000 lakes