The Boston Post Road, originally known as Bay Path, was the first developed road west from Boston through central Massachusetts.

The trolley comes to the town of Shrewsbury, passing between Boston Hill on the left and Hamblin Hill on the right.

It was proposed to build a road from the east line of Amherst, on the country road, near William Breton’s house, to the great road in Shrewsbury.

Between Boston and Springfield, Massachusetts, along the Upper Boston Post Road, there are 40 surviving milestones.