June 28th is Paul Bunyan Day (http://www.punchbowl.com/holidays/paul-bunyan-day).
Take a book about Paul Bunyan to a park and enjoy Paul Bunyan Day.
Agate Falls Scenic Site - http://www.michigandnr.com/parksandtrails/Details.aspx?id=413&type=SPRK
Laughing Whitefish Falls State Park - http://www.michigandnr.com/parksandtrails/Details.aspx?id=422&type=SPRK
Onaway State Park - http://www.michigandnr.com/parksandtrails/Details.aspx?id=479&type=SPRK
Seven Lakes State Park - http://www.michigandnr.com/parksandtrails/Details.aspx?id=492&type=SPRK
Wilderness State Park - http://www.michigandnr.com/parksandtrails/Details.aspx?id=509&type=SPRK