New Hampshire Route 18
Map of Grafton County in northwestern New Hampshire with NH 18 highlighted in red | ||||
| Route information | ||||
| Maintained by NHDOT | ||||
| Length | 20.116 mi (32.374 km) | |||
| Existed | 1922–present | |||
| Major junctions | ||||
| South end | I-93 / US 3 in Franconia | |||
| North end | VT 18 in Waterford, VT | |||
| Location | ||||
| Country | United States | |||
| State | New Hampshire | |||
| Counties | Grafton | |||
| Highway system | ||||
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New Hampshire Route 18 is a 20.116-mile-long (32.374 km) state highway in northwestern New Hampshire. It is a local road serving Franconia, Bethlehem, and Littleton, New Hampshire, which I-93 bypasses. Its northern extension, Vermont Route 18, continues northward from the Connecticut River to St. Johnsbury, Vermont. NH 18 closely parallels I-93 for its entire length and has several interchanges with the Interstate highway.