For those staying on the island remember there are no cars on the island. You will have to walk or ride a bike to the start race morning at the Shepler's Ferry Docks.
If you are staying on the mainland and need to park a car race morning in Mackinaw City, there is free day parking with shuttle to the ferry for athletes race morning. Park at:
Shepler's Day Parking Lot
311 S Nicolet St.
Mackinaw City, MI 49701
The button/link below is a live google site map. It also contains the course maps for the event. If pulled up when onsite you will see where you are (blue dot) in relation to the items on the map.