Massachusetts Route 9
East-west state highway in Massachusetts, US

Route 9 is a 135.310-mile-long (217.760 km) major east–west state highway in Massachusetts, United States. Along with U.S. Route 20 (US 20), Route 2, and Interstate 90, Route 9 is one of the major east–west routes of Massachusetts. The western terminus is near the center of the city of Pittsfield. After winding through the small towns along the passes of the Berkshire Mountains, it crosses the college towns of the Pioneer Valley and then south of the Quabbin Reservoir and the rural areas of western Worcester County. Entering the city of Worcester from the southwestern corner of the city, it passes through the center of the city and forms the major commercial thoroughfare through the MetroWest suburbs of Boston, parallel to the Massachusetts Turnpike. Crossing the Route 128 freeway circling Boston, it passes through the inner suburbs of Newton and Brookline along Boylston Street, and enters Boston on Huntington Avenue, before reaching its eastern terminus at Copley Square.
Route description
Route 9 passes through six counties and twenty-eight cities and towns.
Western end (Pittsfield–Worcester)
Route 9 begins in the western Massachusetts city of Pittsfield, at U.S. Route 20. After separating from US-20, it has a brief (.2 mile) concurrency with U.S. Route 7 through the center of that city, then continues east, passing through the towns of Dalton and Windsor, wherein the route reaches its highest point at 2033 ft, in Berkshire County. It continues its winding pass through the small towns of The Berkshires in Berkshire and western Hampshire Counties before passing through the center of Northampton, passing Smith College before its first interstate junction, at Interstate 91.
The public source identifies “Massachusetts Route 9” as east-west state highway in Massachusetts, US. This brief keeps that definition visible, then builds a research path around Massachusetts, Route and East-west.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 26, 2026. The linked authority identifier is Q2483962. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2033.
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This entry incorporates text from “Massachusetts Route 9” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.