Hartwick Pines State Park is just north of Grayling, Michigan. It is the largest state park in northern lower Michigan. It is also has the last virgin forest in the Lower Peninsula. It is the fifth largest State Park Overall.
In 1927, his wife bought 8,000 acres of land, including the last 85 acres of virgin pine in the Lower Peninsula. Shortly after, she donated the land to the State and the State Park was born.