Mackinac Island Calendar 2025. Held at the historic grand hotel on mackinac island from tuesday, may 27, to friday, may 30, 2025, the conference will bring. As always, mackinac island recreational development has chosen a wonderful selection of images for the calendar and the island bookstore is.

Events include the lilac queen coronation, 10k run/walk, lilac walking tours and planting seminars, kids. The jewel of the great lakes.