Massachusetts Route 23
Route 23 is a west–east route in the western Massachusetts counties of Berkshire and Hampden. The entire route is . Most of the road, approximately , follows the Knox Trail, the historic route of General Henry Knox took to bring cannon from Fort Ticonderoga on Lake Champlain in New York to aid in ending the Siege of Boston in the winter of 1775–76. Prior to 1939, Route 23 was numbered as Route 17, which extended from Great Barrington to the New York state line. Route description Route 23 begins at the New York state border at Egremont, Massachusetts, as a continuation of New York State Route 23 from Hillsdale. The road passes Catamount Ski Area and the village of South Egremont before merging with Route 41, just west of Great Barrington. It passes the Egremont Country Club and the Great Barrington Airport before passing the eastern terminus of Route 71. At this point the road becomes the Knox Trail. From there the road heads towards the town center, merging with U.S. Route 7, following that road for one mile (1.6 km) before leaving Route 41, with Routes 7 and 23 turning eastward, crossing the Housatonic River. After another half-mile, U.S.