Great Blue Hill is a hill of 635 feet located within the Blue Hills Reservation in Milton, Randolph and Canton, Massachusetts, about 10 miles (16 km) south of downtown Boston. It is the highest point in Norfolk County and the Greater Boston area.

Blue Hills Reservation is a 7,000-acre (2,800 ha) state park in Norfolk County, Massachusetts in the United States. Managed by the Massachusetts Department of Conservation and Recreation, it covers parts of Milton, Quincy, Braintree, Canton, Randolph, and Dedham. Located approximately ten miles south of downtown Boston, the reservation is one of the largest parcels of undeveloped conservation land within the Greater Boston metropolitan area. The park's varied terrain and scenic views make it a popular destination for hikers from the Boston area.