Jennifer Vincent Archives Antique Tractors Cross Mackinac Bridge Drivers from across the country crated the largest crossing of antique tractors on the Mackinac Bridge. Published on: Nov 7, 2011 Tweet Post to Your Wall. Email Story RSS Permalink Print Drivers were from all over Michigan, Ohio, Indiana, Illinois, Wisconsin and Ontario, Canada showed up Sept. 16 to create the largest antique tractor crossing of the Mackinac Bridge. The fourth annual Mackinac Bridge Antique Tractor Crossing drew a record 820 tractors – representing 35 clubs -- that were at least 40 years old. It took about 3.5 hours for ride that starts at a staging area in Mackinaw City then parades across the bridge, through St. Ignace and culminates at the Kewadin Casino into a parking lot. In total it's about 18 miles.