Mackinac Island 2025 Calendar. Below you will find opening date information for this season. Held at the historic grand hotel on mackinac island from tuesday, may 27, to friday, may 30, 2025, the conference will bring.

Join us for the lilac queen coronation, official poster reveal, 10k run/walk, lilac walking tours, lilac. Registration is open for the 2025 mackinac policy conference.