Massachusetts Route 186

Route 186
Map of northern Connecticut with CT 186 highlighted in solid red and of southern Massachusetts with MA 186 highlighted in dotted red
Route information
Maintained by ConnDOT and MassHighway
Length:	6.00 mi (9.66 km) Connecticut: 3.57 miles (5.75 km) Massachusetts: 2.43 miles (3.91 km)
Existed:	1932 – present
Major junctions
South end:	Route 190 in Somers, CT
North end:	Route 83 / Route 220 in E. Longmeadow, MA
Location
Counties:	CT: Tolland, MA: Hampden
Highway system
Routes in Connecticut Interstate U.S. State SSR SR ← Route 185 Route 187 → ← Route 183 MA Route 187 →

Route 186 is a numbered route in the U.S. states of Connecticut and Massachusetts, serving the southeastern suburbs of Springfield, Massachusetts. The route runs from Route 190 in the Somersville section of the Connecticut town of Somers to the town center of East Longmeadow, Massachusetts. Within Massachusetts, the road is town-maintained.

Route 186 begins at an intersection with Route 190 in the Somersville section of Somers and heads north for about 3.6 miles (5.8 km) to the Massachusetts state line. The road continues across the Connecticut-Massachusetts state line as Prospect Street for another 2.4 miles (3.9 km) towards East Longmeadow center. Route 186 ends at a complex seven-way intersection (the East Longmeadow Rotary) involving Route 83 (North Main Street and Somers Road), Route 220 (Shaker Road), Maple Street, Elm Street, and Pleasant Street. In Connecticut, Route 186 is known as Hall Hill Road, named after the 320-foot Hall Hil, which the road climbs over. Route 186 is classified as an urban collector road and carries average daily volumes of 2,000 vehicles.