How many miles would it be to get from Sault Ste Marie to Detroit if there weren't the bridge connecting the two parts of Michigan?

If there were no bridge connecting upper and lower Michigan, it would be almost 1,000 miles to get from Sault Ste. Marie, Michigan to Detroit, Michigan by traveling to the east around Lake Huron. It a person traveled around Lake Michigan to the west, it would be over 1,000 miles.