Massachusetts Route 21
Route 21 highlighted in red | ||||
| Route information | ||||
| Maintained by MassDOT | ||||
| Length | 13.73 mi (22.10 km) | |||
| Major junctions | ||||
| South end | US 20 in Springfield | |||
| North end | Route 9 in Belchertown | |||
| Location | ||||
| Country | United States | |||
| State | Massachusetts | |||
| Counties | Hampden, Hampshire | |||
| Highway system | ||||
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Route 21 is a 13.73-mile-long (22.10 km) south–north state highway in Massachusetts that runs between U.S. Route 20 (US 20) and Route 141 in Springfield and Route 9 in Belchertown. Along the way it intersects several major highways including Interstate 90 (I-90) in Ludlow and US 202 and Route 181 in Belchertown.