The Upper Charles River Reservation is a state park and recreation area in Suffolk, Norfolk, and Middlesex Counties in the state of Massachusetts. It features the beautiful Charles River Basin.

Like the Charles River Reservation, the Upper Charles River Reservation is a linear park. It extends from the Watertown Dam in Watertown to West Roxbury at the Riverdale Park. It covers about 20 acres along the banks of the Charles River Basin.

The Upper Charles River Reservation was created in efforts of reclaiming the Charles River Basin, which got polluted through the years of being used for industrial and other purposes. The park is one of the ways the community and local government transforms the river into a healthy body of water once again.