Route 117 is a 31.0718-mile-long (50.0052 km) east–west state highway in Massachusetts, running from Route 12 in Leominster in northeast Worcester County to U.S. Route 20 (US 20) in Waltham in central Middlesex County.

Quick Facts Route 117, Route information ...

Route 117
Route 117 highlighted in red
Route information
Maintained by MassDOT
Length	31.0718 mi[1] (50.0052 km)
Major junctions
West end	Route 12 in Leominster
Major intersections	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
Country	United States
State	Massachusetts
Counties	Worcester, Middlesex
Highway system
Massachusetts State Highway System Interstate US State
← Route 116 → Route 118

Close

Route 117 begins in the city of Leominster, near the city center, and passes southeast along Lancaster Street before having an interchange with Interstate 190's Exit 7, just over the city 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 serves as the northern terminus 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 the southern tip of Concord and enters the town of Lincoln over the Sudbury River.

In Lincoln, Route 117 passes through the southwest end of town, intersecting Route 126 and the Fitchburg Line south of the Lincoln station before crossing into Weston. In Weston the route bends southeastward through the Silver Hill, Hastings and Kendal Green sections of town before entering Waltham. Serving as the city's Main Street, the route crosses I-95 and its concurrent route Highway 128 without an interchange before ending at U.S. Route 20, which in turn continues Main Street through Waltham's downtown.