text:  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 Sault – Green Bay Trail roughly followed the Lake Michigan shoreline routing of US 2 between Escanaba and St. Ignace . The Mackinac Trail connected St. Ignace with Sault Ste . Marie . 
  