Massachusetts Route 16

Route 16
Route 16 highlighted in red
Route information
Maintained by MassDOT
Length	59.8646 mi[1] (96.3427 km)
Major junctions
West end	Route 12 / Route 193 in Webster
Major intersections	I-395 in Webster Route 146 in Uxbridge Route 9 in Wellesley I-95 / Route 128 in Newton I-90 / Mass Pike in Newton US 20 in Watertown US 3 / Route 2 in Cambridge I-93 in Medford US 1 in Revere
East end	Route 1A / Route 60 in Revere
Location
Country	United States
State	Massachusetts
Counties	Worcester, Middlesex, Norfolk, Suffolk
Highway system
Massachusetts State Highway System Interstate US State
← Route 15 → Route 17

Route 16 is a 59.8646-mile-long (96.3427 km) east–west state highway in Massachusetts. It begins in the west at an intersection with Route 12 and Route 193 in Webster, just north of the Connecticut state border. It runs in a generally southwest-northeast routing through a number of Boston's suburbs and runs to the west and then north of the city before ending in Revere at an intersection with Route 1A and Route 60.

From Watertown eastward, Route 16 is a multi-lane arterial road, although it is not limited access for any significant length. Segments of Route 16 through this area are also known as the Mystic Valley Parkway, the Alewife Brook Parkway, and the Revere Beach Parkway, among other names.

From the western end of the Route 135 concurrency in Wellesley to Route 30 (Commonwealth Avenue) in Newton, the route serves as a part of the Boston Marathon, from the halfway point to just before Mile 18 and the hills.