Route 186 (Connecticut–Massachusetts)

Route 186
Map of northern Connecticut and southern Massachusetts with CT 186 in solid red and MA 186 in dotted red
Route information
Maintained by ConnDOT and Town of East Longmeadow
Length	6.00 mi[1][2] (9.66 km) 3.57 miles (5.75 km) in CT 2.43 miles (3.91 km) in MA
Existed	1932 (CT 186);[3] 1939 (MA 186)[4]–present
Major junctions
South end	Route 190 in Somers, CT
North end	Route 83 / Route 220 in East Longmeadow, MA
Location
Country	United States
States	Connecticut, Massachusetts
Counties	CT: Tolland, MA: Hampden
Highway system
Connecticut State Highway System Interstate US State SSR SR Scenic
← Route 185 → Route 187
← Route 183 MA → Route 187

Route 186 is a 6-mile-long (9.7 km) 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,^[1] 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.

Route 186 was established as a new route in the 1932 state highway renumbering in Connecticut.^[3] The continuation in Massachusetts, which was previously unnumbered, was designated in 1939.^[4] In 1951, the southern end of Route 186 was relocated to use Four Bridges Road to end at Route 83. As part of the 1962 Route Reclassification Act, the southern alignment was returned to its original location.^[5]

State	County	Location	mi	km	Destinations	Notes
Connecticut	Tolland	Somers	0.00	0.00	Route 190 – Stafford Springs, Enfield	Southern terminus
Connecticut–Massachusetts state line			3.57 0.00	5.75 0.00	Route transition
Massachusetts	Hampden	East Longmeadow	2.43	3.91	Route 83 / Route 220 south – Springfield, Agawam, Hampden, Somers, CT, Enfield, CT	Northern terminus; 5 Corners rotary; northern terminus of Route 220
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Route transition