Massachusetts Route 16

Route 16
Map of the Boston area with Route 16 in red
Route information
Length:	59.8646 mi (96.3427 km)
Major junctions
West end:	Route 12 / Route 193 in Webster
	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
Counties:	Worcester, Middlesex, Norfolk, Suffolk
Highway system
Massachusetts State Highway System Interstate US State ← Route 15 Route 17 →

Route 16 is an 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.

Much of Route 16 east of the Newton-Wellesley town line, and especially from Cambridge eastward, is a multi-lane parkway, although it is not limited access for any significant length of road. Segments of Route 16 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.

Route 16 begins at Routes 12 and 193, not far from the Connecticut border. In Webster, along the shore of Lake Chaubunagungamaug, it intersects I-395.