PO Box 1800
6929 Main Street
Mackinac Island, MI 49757
In Season Hours: 8:00 a.m. until 8:00 p.m. (Memorial Day through Labor Day)
Off Season Hours (April until Memorial Day and after Labor Day until end of October) : 8:00 p.m. until 6:00 p.m.
Seven days a week
By appointment only from November through March.