How many miles is it from Indianapolis to Bay City Michigan?

Answer 1

337 miles taking this route:

1. Take I-69 NORTH from Indianapolis (& EAST past LANSING, Michigan) to I-75 to SAGINAW and DETROIT at EXIT 133. Stay in the left-hand lane and go onto I-75 NORTH to SAGINAW.
2. Take I-75 NORTH to Bay City.