The Mystic River Reservation is a publicly owned nature preserve with recreational features located along the Mystic River in the towns of Winchester, Arlington, Medford, Somerville, Everett, and Chelsea in eastern Massachusetts.

[5] The Mystic River Reservation originally comprised a little over 250 acres (100 ha) of land.

Proposed projects included a partnership between the DCR and the City of Medford to restore the Condon Shell (an outdoor amphitheater located just outside Medford Square); restoration of the Amelia Earhart Dam basin parklands; and a $3.6 million federally funded link between the reservation, the Minuteman Bikeway, and the Alewife "T" Station.

[3] The lower parkland is being redeveloped as part of Assembly Square construction.

[7] Reconstruction of Draw Seven Park is expected to last from late summer 2024 to 2026.