Route 2A is a 98.5-mile-long (158.5 km) east–west state highway in Massachusetts. It exists in several sections, mainly as parts of former Route 2 that have been moved or upgraded. Route 2A runs from Greenfield in the west to Boston in the east. It formerly extended to Shelburne Falls in Buckland in the west, but as of 2007, the route terminates at Interstate 91 (I-91) in Greenfield.