New Hampshire Route 1A is an 18.32 miles (29.5 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...

 located in southeast 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...

. The route runs along the Atlantic

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 coastline from the Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

 border north to Rye

Rye, New Hampshire

Rye is a town in Rockingham County, New Hampshire, United States. The population was 5,298 at the 2010 census.-History:The first settlement in New Hampshire, originally named Pannaway, was established in 1623 at Odiorne's Point. The first settler in Rye was William Berry...

, then turns toward downtown Portsmouth

Portsmouth, New Hampshire

Portsmouth is a city in Rockingham County, New Hampshire in the United States. It is the largest city but only the fourth-largest community in the county, with a population of 21,233 at the 2010 census...

. The southern terminus is at the Massachusetts state line in Seabrook

Seabrook, New Hampshire

Seabrook is a town in Rockingham County, New Hampshire, United States. The population was 8,693 at the 2010 census. Located at the southern end of the coast of New Hampshire on the border with Massachusetts, Seabrook is noted as the location of the Seabrook Nuclear Power Station, the third-most...

 at the junction with Massachusetts' Route 1A

Route 1A (Massachusetts)

Route 1A is a south–north state highway in Massachusetts. It is an alternate route to U.S. 1 with three signed sections and two unsigned sections where the highway is concurrent with its parent...

. The northern terminus is at the junction with U.S. Route 1 in Portsmouth. For the length of the road’s run along the shore, its local name is Ocean Boulevard. In Portsmouth, it is known as Miller Avenue and Sagamore Avenue.

Route description

Route 1A begins at the state border between Seabrook and Salisbury, Massachusetts

Salisbury, Massachusetts

Salisbury is a town in Essex County, Massachusetts, United States. The population was 7,827 at the 2000 census. The community is a popular summer resort beach town situated on the Atlantic Ocean north of Boston on the New Hampshire border....

. Merely 50 yards (45.7 m) after crossing the state line, Route 1A meets the eastern end of Route 286

Massachusetts/New Hampshire Route 286

Route 286 is a short, east–west state highway in Salisbury, Massachusetts and Seabrook, New Hampshire. The route was previously known as Route 86 and renumbered to avoid a numerical conflict with the designation of a freeway as Interstate 86 in the 1970s.-Route description:The eastern...

, an extension of MA Route 286, a connector to U.S. Route 1 and Interstate 95

Interstate 95

Interstate 95 is the main highway on the East Coast of the United States, running parallel to the Atlantic Ocean from Maine to Florida and serving some of the most populated urban areas in the country, including Boston, Providence, New Haven, New York City, Newark, Philadelphia, Baltimore,...

 in Salisbury. Route 1A proceeds north, passing east of Hampton Harbor into Hampton Beach

Hampton Beach, New Hampshire

Hampton Beach is a village district, census-designated place, and beach resort within the town of Hampton, in the U.S. state of New Hampshire, located on the Atlantic Ocean. Its population at the 2010 census was 2,275. Hampton Beach is located in Rockingham County, approximately south of Portsmouth...

. It is in Hampton Beach where Route 101 meets its eastern end at Route 1A as a mere single lane alleyway in each direction (Church Street northbound, Highland Avenue southbound). Route 1A continues as a four-lane divided highway running directly next to the coastline beaches. Just north of an intersection with Winnacunnet Road, Route 1A narrows back to a two-lane undivided highway, and then meets the eastern end of Route 27

New Hampshire Route 27

New Hampshire Route 27 is a long east–west highway in southeastern New Hampshire. The western terminus of NH 27 is in Hooksett at U.S. Route 3 and New Hampshire Route 28 north of Manchester...

. The road continues another mile or so, crossing into North Hampton

North Hampton, New Hampshire

North Hampton is a town in Rockingham County, New Hampshire, United States. The population was 4,301 at the 2010 census. While the majority of the town is inland, North Hampton includes a part of New Hampshire's limited Atlantic seacoast.-History:...

, and meets the eastern end of Route 111. Route 1A proceeds north out of North Hampton and along the coastline past Rye Beach

Rye Beach, New Hampshire

Rye Beach is a community along the Atlantic Ocean in Rye, New Hampshire in the United States. It is located along New Hampshire Route 1A near the southern border of the town of Rye, directly south of Jenness Beach State Park and north of Little Boar's Head .The Ocean House built in 1844 was owned...

, Rye

Rye, New Hampshire

Rye is a town in Rockingham County, New Hampshire, United States. The population was 5,298 at the 2010 census.-History:The first settlement in New Hampshire, originally named Pannaway, was established in 1623 at Odiorne's Point. The first settler in Rye was William Berry...

 North Beach, Wallis Sands, and Odiorne Point State Park

Odiorne Point State Park

Odiorne Point State Park is a New Hampshire state park located on the seacoast in Rye near Portsmouth. The location of the first settlement in New Hampshire, the point got its name from the Odiorne family, who settled on the land in the mid-1660s....

, where it turns west, away from the ocean. The road turns back north at the intersection known as Foyes Corner and enters the Portsmouth

Portsmouth, New Hampshire

Portsmouth is a city in Rockingham County, New Hampshire in the United States. It is the largest city but only the fourth-largest community in the county, with a population of 21,233 at the 2010 census...

 city limits, passing the southern end of Route 1B. Route 1A continues towards downtown Portsmouth, where it ends at the intersection of Miller Avenue and Middle Street (U.S. Route 1).

Junction list

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Road names along route

NH Route 1A is known by the following local street names:

Seabrook

• Ocean Boulevard

Hampton

• Ocean Boulevard
• Ashworth Avenue (southbound)

North Hampton

• Ocean Boulevard

Rye

• Ocean Boulevard
• Pioneer Road
• Sagamore Avenue

Portsmouth

• Sagamore Avenue
• Miller Avenue