Late winter, when the sap begins to flow, means maple syrup is coming soon. It takes 40 gallons of maple sap to make a gallon of sweet syrup. Several places near Kalamazoo offer demonstrations of the process and celebrations of the season.
Kalamazoo Nature Center Maple Sugar Festival 2010
Kellogg Forest Maple Sugar Day
Blandford Nature Center Sugarbush Festival & Pancake Breakfast
Indiana Dunes National Lakeshore Maple Sugar Time
St Joseph County Parks, IN Sugar Camp Days
Vermontville Maple Syrup Festival
Or read the Michigan Backyard Gardener on making your own syrup.