 In 1701 , the first transportation routes through what became the state of Michigan were the lakes , rivers and Indian trails . Two of these trails followed parts of the future US 2 . The <unk> – Green Bay Trail roughly followed the Lake Michigan shoreline routing of US 2 between <unk> and St. Ignace . The Mackinac Trail connected St. Ignace with <unk> <unk> . Marie . 
