State Route 236, also known as the Dow Highway, is a 15.8 miles (25.4 km) long state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in southwestern Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

. It runs from south to north, from an intersection with State Route 103

Maine State Route 103

State Route 103 is a long state highway in extreme southern Maine. The route is signed east–west, but forms a half-loop, with most of its eastern segment skirting the Piscataqua River and the state border with New Hampshire.-Route description:...

 in Kittery

Kittery, Maine

Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals...

 to an intersection with State Route 9

Maine State Route 9

State Route 9 is a numbered state highway in Maine, running from the New Hampshire border at Berwick in the west to the Canadian border with New Brunswick at Calais in the east. State Route 9 runs a total of .-Route description:...

 in Berwick, just east of the border with New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

.

Route description

The southern terminus of Route 236 is at the intersection of Whipple Road (Route 103

Maine State Route 103

State Route 103 is a long state highway in extreme southern Maine. The route is signed east–west, but forms a half-loop, with most of its eastern segment skirting the Piscataqua River and the state border with New Hampshire.-Route description:...

), Woodlawn Avenue, and Shapleigh Road in Kittery

Kittery, Maine

Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals...

, near the main entrance to the Portsmouth Naval Shipyard

Portsmouth Naval Shipyard

The Portsmouth Naval Shipyard , often called the Portsmouth Navy Yard, is a United States Navy shipyard located in Kittery on the southern boundary of Maine near the city of Portsmouth, New Hampshire. It is used for remodeling and repairing the Navy's ships...

. It follows Shapleigh Road, then Rogers Road, to the Kittery Traffic Circle, where it connects to U.S. Route 1, the Route 1 Bypass, and Old Post Road. The rotary marks the beginning of the Dow Highway. Passing under the Route 1 Bypass and over Interstate 95, the route heads along the former right-of-way of the B&M Railroad until a T-intersection with Main Street (Route 4), the end of the Dow Highway. Route 236 runs briefly with Route 4 through downtown South Berwick

South Berwick, Maine

South Berwick is a town in York County, Maine, United States. The population was 7,220 at the 2010 census. South Berwick is home to Berwick Academy, a private, co-educational university-preparatory day school founded in 1791...

, then splits off to follow Berwick Road into Downtown Berwick, along Allen St to its northern terminus at School Street (Route 9

Maine State Route 9

State Route 9 is a numbered state highway in Maine, running from the New Hampshire border at Berwick in the west to the Canadian border with New Brunswick at Calais in the east. State Route 9 runs a total of .-Route description:...

) near the New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

 state line.

History

Most of Route 236, between Interstate 95 in Kittery

Kittery, Maine

Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals...

 and State Route 91

Maine State Route 91

State Route 91 is a short state highway in southwestern Maine. It runs west to east for just under , connecting the towns of South Berwick and York.-Junction list:...

 in South Berwick

South Berwick, Maine

South Berwick is a town in York County, Maine, United States. The population was 7,220 at the 2010 census. South Berwick is home to Berwick Academy, a private, co-educational university-preparatory day school founded in 1791...

, was built in 1956 on the former right-of-way of the B&M Railroad after service was discontinued and the tracks removed four years earlier.

Junction list

County	Location	Notes	Roads intersected	Notes
York York County, Maine York County is a county located in the U.S. state of Maine. In 2010, the population was 197,131. Its county seat is Alfred.Founded in 1636, it is the oldest county in Maine and one of the oldest in the United States....	Kittery Kittery, Maine Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals...	0.0	State Route 103 Maine State Route 103 State Route 103 is a long state highway in extreme southern Maine. The route is signed east–west, but forms a half-loop, with most of its eastern segment skirting the Piscataqua River and the state border with New Hampshire.-Route description:...	Southern terminus of State Route 236.
			U.S. Route 1	Rotary. To Interstate 95 North, via US-1 North. To State Route 101 Maine State Route 101 State Route 101 is a short state highway in extreme southern Maine. It follows a southeast-northwest trajectory, signed as south–north. Route 101 begins at an intersection with U.S... , via US-1 North
			U.S. Route 1 Bypass	Interchange.
			Interstate 95 South	I-95 Exits 2/3; partial interchange, no access to I-95 North from Route 236.
	Eliot Eliot, Maine Eliot is a town in York County, Maine, United States. The population was 6,204 at the 2010 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area....		State Route 103 Maine State Route 103 State Route 103 is a long state highway in extreme southern Maine. The route is signed east–west, but forms a half-loop, with most of its eastern segment skirting the Piscataqua River and the state border with New Hampshire.-Route description:...	Western terminus of State Route 103.
	South Berwick South Berwick, Maine South Berwick is a town in York County, Maine, United States. The population was 7,220 at the 2010 census. South Berwick is home to Berwick Academy, a private, co-educational university-preparatory day school founded in 1791...		State Route 101 Maine State Route 101 State Route 101 is a short state highway in extreme southern Maine. It follows a southeast-northwest trajectory, signed as south–north. Route 101 begins at an intersection with U.S...	To Dover, New Hampshire Dover, New Hampshire Dover is a city in Strafford County, New Hampshire, in the United States of America. The population was 29,987 at the 2010 census, the largest in the New Hampshire Seacoast region... , via Route 101 North.
			State Route 91 Maine State Route 91 State Route 91 is a short state highway in southwestern Maine. It runs west to east for just under , connecting the towns of South Berwick and York.-Junction list:...	Western terminus of State Route 91.
			State Route 4 Maine State Route 4 State Route 4 is part of Maine's system of numbered state highways, running from the New Hampshire border in South Berwick to Haines Landing on Mooselookmeguntic Lake in the town of Rangeley...  South	To NH Route 4 New Hampshire Route 4 New Hampshire Route 4 is a long state highway located in eastern Strafford County, New Hampshire. The southwestern terminus of the route is at New Hampshire Route 9 and New Hampshire Route 108 in downtown Dover. The northeastern terminus is at the Maine state line in Rollinsford.The southern... .
			State Route 4 Maine State Route 4 State Route 4 is part of Maine's system of numbered state highways, running from the New Hampshire border in South Berwick to Haines Landing on Mooselookmeguntic Lake in the town of Rangeley...  North
		15.8	State Route 9 Maine State Route 9 State Route 9 is a numbered state highway in Maine, running from the New Hampshire border at Berwick in the west to the Canadian border with New Brunswick at Calais in the east. State Route 9 runs a total of .-Route description:...	Northern terminus of State Route 236. To NH Route 9/236 New Hampshire Route 236 New Hampshire Route 236 is a long east–west road in the city of Somersworth, New Hampshire. Its western terminus is at an intersection with New Hampshire Route 108 west of downtown. Its eastern terminus is at the Maine state line in Somersworth. Routes 9 and 236 cross the border, where Route 236... , via Route 9 West.