Lower Peninsula of Michigan
In 1927, his widow, Karen Hartwick, purchased more than of land, including the last of virgin pine in the Lower Peninsula of Michigan. Shortly afterwards, she donated the parcel to the state of Michigan in her husband's name. Thus Hartwick Pines State Park, the largest state park in the Lower Peninsula of Michigan, was named in his honor. The Edward E. Hartwick Memorial Building museum within the park is listed on the National Register of Historic Places.