The Michigan Department of Natural Resources owns and sponsors 81 Harbors and lists several Harbors of Refuge on the Great Lakes. Some of the marinas and harbors are operated and maintained by local units of government through conditions of grant agreements. Harbors of Refuge provide a spot to moor until weather conditions improve, but there is no guarantee of a slip or dock space at these locations.
Boaters may make slip reservations online at 34 harbors throughout the Great Lakes. About 75 percent of the slips at each location are available for reservation, which allows ample openings during inclement weather. Reservations may be made for all dates up to six months in advance of your arrival date.
Reservations at these select harbors may also be made by calling 800-447-2757 (1-800-44PARKS) between 8 a.m. and 8 p.m., Monday through Friday, and from 9 a.m. to 5 p.m. on Saturday and Sunday.
The following harbors are now available for making a reservation online:Port Sanilac Harbor