Harbor Springs High School boasts a state-of-art, 400-seat performing arts center, on left. About 20 miles east, Inland Lakes Schools uses a middle school gym, right, for the same purpose. Folding chairs are added for seating. (Bridge photos by John Russell) Breezing north up I-75 – just 30 miles south of the Mackinac Bridge – it's easy to miss the Indian River exit sign. Except for the Cross in the Woods, a nearby 55-foot redwood crucifix that draws the occasional tourist, and snowmobile trails that pull in a few more, this sparsely settled region is a place where economic survival can be day to day.