New Hampshire Route 1A

New Hampshire Route 1A

New Hampshire Route 1A marker

New Hampshire Route 1A
Route information
Maintained by NHDOT
Length: 18.32 mi[1] (29.48 km)
Major junctions
South end: MA Route 1A.svg MA Route 1A in Salisbury, MA
  NH Route 101.svg NH Route 101 in Hampton
North end: US 1.svg U.S. Route 1 in Portsmouth
Counties: Rockingham
Highway system

New Hampshire Routes

US 1 NH 1B

New Hampshire Route 1A is an 18.32-mile (29.48 km) long state highway located in southeast New Hampshire. The route runs along the Atlantic coastline from the Massachusetts border north to Rye, then turns toward downtown Portsmouth. The southern terminus is at the Massachusetts state line in Seabrook at the junction with Massachusetts' Route 1A. 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

Older-style NH Route 1A shield, still prominent on signs.

Route 1A begins at the state border between Seabrook and Salisbury, Massachusetts. Merely 50 yards (46 m) after crossing the state line, Route 1A meets the eastern end of Route 286, an extension of MA Route 286, a connector to U.S. Route 1 and Interstate 95 in Salisbury. Route 1A proceeds north, passing east of Hampton Harbor into Hampton Beach. 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. The road continues another mile or so, crossing into North Hampton, and meets the eastern end of Route 111. Route 1A proceeds north out of North Hampton and along the coastline past Rye Beach, Rye North Beach, Wallis Sands, and Odiorne Point State Park, where it turns west, away from the ocean. The road turns back north at the intersection known as Foyes Corner and enters the Portsmouth 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

County Location Mile Destinations Notes
Seabrook 0.00 MA Route 1A.svg MA Route 1A Northern terminus of MA Route 1A.
Southern terminus of NH Route 1A
0.03 NH Route 286.svg NH Route 286 Eastern terminus of NH Route 286.
To I-95.svg Interstate 95.
Hampton NH Route 101.svg NH Route 101 Eastern terminus of NH Route 101.
NH Route 27.svg NH Route 27 Eastern terminus of NH Route 27.
North Hampton NH Route 111.svg NH Route 111 Eastern terminus of NH Route 111.
Portsmouth NH Route 1B.svg NH Route 1B Southern terminus of NH Route 1B.
18.32 US 1.svg U.S. Route 1 Northern terminus of NH Route 1A.

Road names along route

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

  • Ocean Boulevard
  • Ocean Boulevard
  • Ashworth Avenue (southbound)
North Hampton
  • Ocean Boulevard
  • Ocean Boulevard
  • Pioneer Road
  • Sagamore Avenue
  • Sagamore Avenue
  • Miller Avenue


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