From there, Route 85 heads northward into Hopkinton, passing the eastern side of Echo Lake.

It intersects Route 135 at the center of town, less than a quarter mile west of the starting line of the Boston Marathon.

In Southborough, Route 85 crosses under I-90 (the Mass Pike) without junction; the nearest exit is in neighboring Framingham.

[2] In 2011 a $10.8 million project to reconstruct 7,700 feet (1.5 miles) from School Street/Park Street to the Marlborough City Line begun.

The Walmart Driveway was reconstructed with bicycle accommodation, ADA compliance, and a new traffic signal.

The section between Route 85 Connector and Broad Street consisted of four lanes (two in each direction) with a 4-foot (1.2 m) raised concrete median.

At Park Street/School Street, a new traffic signal was installed and a new southbound right turn lane will be constructed.