From the Eliot Tower at the summit, the city of Boston and many of the surrounding hills of the Milton and Canton area are visible. Other information. Great Blue Hill, and the Blue Hills Reservation in general, is a popular hiking destination, valued as much for its splendid trails and views as for its proximity to the metropolitan area.
The ridge, when viewed from a distance, appears standing in an azure mist of vapor, hence the appellation 'Blue Island'." Geography [ edit ] According to the 2021 census gazetteer files, Blue Island has a total area of 4.16 square miles (10.77 km 2 ), of which 4.07 square miles (10.54 km 2 ) (or 97.93%) is land and 0.09 square miles (0.23 km 2 ) (or 2.07%) is water.