Massachusetts Route 117

Route 117
Map of eastern Massachusetts with Route 117 highlighted in red
Route information
Maintained by MassDOT
Length:	31.07 mi (50.00 km)
Major junctions
West end:	Route 12 in Leominster
	I‑190 / Route 70 in Lancaster Route 110 in Bolton I‑495 / Route 85 in Bolton Route 62 in Stow / Maynard Route 27 in Maynard Route 126 in Lincoln
East end:	US 20 in Waltham
Location
Counties:	Worcester, Middlesex
Highway system
Massachusetts State Highway System Interstate US State ← Route 116 Route 118 →

Route 117 is an east–west state highway in Massachusetts, running from Leominster in northeast Worcester County to Waltham in central Middlesex.

Route 117 begins in the city of Leominster, near the city center. It passes southeast along Lancaster Street and meets Interstate 190's Exit 7, just over the town line into Lancaster. In Lancaster the route heads eastward, crossing two branches of the Nashua River while having a short, quarter-mile concurrency with Route 70 south of Fort Devens. The route then crosses into Bolton, crossing Route 110 near the Bolton Flats State Wildlife Management Area. It then passes through the center of town before crossing I-495 at exit 27. It meets the northern end of Route 85 before crossing into Middlesex County and the town of Stow.

In Stow, the route passes through the countryside, before meeting Route 62 at the center of town. The two routes head eastward concurrently, entering into Maynard. The routes split just after crossing the Assabet River, with Route 117 heading in a more southeastern direction. The route crosses Route 27 before entering Sudbury. It crosses through North Sudbury before crossing the southern tip of Concord and entering the town of Lincoln over the Sudbury River.