Route 78 is a short south–north highway in northeastern Franklin County, Massachusetts.
Route 78 begins at Route 2A in Orange, just north of the Springfield Terminal railroad tracks and the Millers River. After 1.4 miles (2.3 km), the route enters the town of Warwick. The route passes by several portions of Warwick State Forest and through the town center, before passing Mount Grace and entering Winchester, New Hampshire as New Hampshire Route 78. The route does not intersect any other state routes.
Route 78 at its northern terminus looking southbound.
The entire route is in Franklin County.
Route map: Bing / Google