The Harvard University owns 7 square miles of land spanning 11 properties, and has 31 miles of public trails The official website for Harvard University is

Harvard University Property Map

Harvard University Property List

Name Town Public Trails miles
Harvard Forest Petersham 11
Harvard Forest Phillipston 11
Arnold Arboretum Boston 7
Estabrook Woods Carlisle 7
Estabrook Woods Concord 7
Harvard Yard Cambridge 3.3
Harvard Forest Hamilton 2.2
No Name Cambridge 0.4
Tall Timbers Royalston 0.2
Soldiers Field Athletic Complex Boston 0.1
Peabody Terrace Playground Cambridge 0.1