Route 31 | ||||
|---|---|---|---|---|
 | ||||
| Route information | ||||
| Maintained by MassDOT | ||||
| Length | 58.80 mi[1] (94.63 km) | |||
| Major junctions | ||||
| South end | Dresser Hill Road in Thompson, CT | |||
 US 20 in Charlton Route 9 in Spencer Route 2 in Fitchburg | ||||
| North end |  NH 31 in Mason, NH | |||
| Location | ||||
| Country | United States | |||
| State | Massachusetts | |||
| Counties | Worcester, Middlesex | |||
| Highway system | ||||
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Route 31 is a 58.80-mile-long (94.63 km) north–south state highway in the U.S. state of Massachusetts. It runs from Dudley on the Connecticut border to Ashby on the New Hampshire border.