 The December 1927 Michigan State Highway Department "Official Highway Service Map" shows M-94 routed from Au Train west to Munising and further along its current routing to Manistique.In 1928 or 1929, M-94 was rerouted to run along Munising-Van Meer-Shingleton Road (now H-58 and H-15) and southerly to Shingleton.This routing was abandoned on November 7, 1963.