Castle Farms

5052 M 66 North
Charlevoix, MI 49720 

Icebreaker Mackinaw Maritime Museum Inc.

P.O. Box 39
Mackinaw City, MI 49701 

Shepler’s Mackinac Island Ferry

P.O. Box 250
Mackinaw City, MI 49701 

Straits Area Tour Company (Ugly Anne Boat Tours)

P.O. Box 1061
Mackinaw City, MI 49701