My trip to walk the MACKINAC BRIDGE! Labor Day 2003 The walk across the bridge was fabulous! We started at 7:00 am (right after Governor Granholm). The expansion joints on the bridge are massive! Yes, I really did finish! It took about an hour and a half. I can't ever get away from school! Who did I meet in Mackinaw City but one of my chemistry students! Last updated September 30, 2003