The Harvard University owns 6 square miles of land spanning 11 properties, and has 21 miles of public trails The official website for Harvard University is

Harvard University Property Map

Harvard University Property List

Name Town Public Trails miles
Arnold Arboretum Boston 7
Estabrook Woods Carlisle 7
Estabrook Woods Concord 7
Harvard Yard Cambridge 3.4
Harvard Forest Petersham 1.9
Harvard Forest Hamilton 1.7
Tall Timbers Royalston 0.2
No Name Boston 0
American Academy of Arts & Sciences Cambridge 0
Peabody Terrace Playground Cambridge 0
Harvard Forest Phillipston 0