Maine State Route 6

State Route 6 (SR 6) is part of Maine's system of numbered state highways, running from west to east across the state. Its western terminus is at the Canada–United States border near Sandy Bay (a terminus it shares with U.S. Route 201), where it connects to Quebec Route 173. Its eastern terminus is at the Canada-US border in Vanceboro, where it connects to New Brunswick Route 4. SR 6 is the only highway in Maine to terminate at the Canadian border at both ends. With a length of 207.23 miles (333.50 km), it is the third-longest state highway in Maine. Much of SR 6 runs through isolated parts of the state.

State Route 6
Route of SR 6 highlighted in red
Route information
Maintained by MaineDOT
Length	207.23 mi[1] (333.50 km)
Existed	1949–present
Major junctions
West end	US 201 / R-173 near Saint-Théophile, QC (Armstrong-Jackman Border Crossing)
Major intersections	US 201 / SR 15 in Jackman SR 16 in Abbott SR 15 in Dover-Foxcroft SR 11 in Milo SR 16 / SR 155 in Lagrange I-95 in Enfield US 2 / SR 155 in Enfield/Lincoln US 1 in Topsfield
East end	Route 4 near McAdam, NB (Saint Croix – Vanceboro Bridge)
Location
Country	United States
State	Maine
Counties	Somerset, Piscataquis, Penobscot, Washington
Highway system
Maine State Highway System Interstate US State Auto trails Lettered highways
← SR 5 → SR 7

More than two-thirds of the length of SR 6 is concurrent with other highways. The only section of SR 6 not concurrent with another route is from its junction with US 2 in Lincoln east to the New Brunswick border, a distance of 61.87 miles (99.57 km). Except for this section, locals generally refer to the roads by their other numbers.