Route 123
Map of southern New Hampshire with NH 123 highlighted in red
Route information
Maintained by NHDOT
Length	63.055 mi[1] (101.477 km)
Major junctions
South end	Mason Road in Townsend, MA
Major intersections	NH 31 in Greenville US 202 / NH 101 in Peterborough NH 9 in Stoddard NH 10 in Marlow NH 12 in Walpole
North end	VT 123 near Walpole
Location
Country	United States
State	New Hampshire
Counties	Hillsborough, Cheshire, Sullivan
Highway system
New Hampshire Highway System Interstate US State Turnpikes
← NH 122 → NH 124
← VT 122 VT → VT 125

New Hampshire Route 123 (abbreviated NH 123) is a 63.055-mile-long (101.477 km) secondary north–south state highway in southwestern New Hampshire. The southern terminus of the route is at the Massachusetts state line in Mason where, as Mason Road, the road continues as an unnumbered local road in the town of Townsend. The northern terminus, as signed, is at the Connecticut River, where the highway continues west for 0.313 miles (0.504 km) to U.S. Route 5 in Westminster, Vermont, as Vermont Route 123 (VT 123). Route logs, however, place the terminus at New Hampshire Route 12 in Walpole.

In Walpole, NH 123 runs in a wrong-way concurrency with NH 12 north–south alongside the Connecticut River, the water body that represents the border between New Hampshire and Vermont. For the entire length of the NH 12/NH 123 concurrency, NH 123 South is, in reality, heading north on the compass while NH 123 North is traveling to the south.

History

NH Route 123 heading northbound

In October 2005, heavy flooding in the New Hampshire area forced the closure of NH 123 in two different locations. The first was at the intersection of NH 123 and Cold River Road near Drewsville, where a bridge was destroyed from high water in the Cold River, approximately 5 miles (8 km) east of North Walpole. The second closure was approximately 3 miles (5 km) south of the junction with New Hampshire Route 123A in the town of Alstead, where a section of roadway was completely washed away by the water. Both sections were subsequently rebuilt and reopened.

Major intersections

County	Location[1][2]	mi[1][2] [3]	km	Destinations	Notes
Hillsborough	Mason	0.000	0.000	Mason Road – Townsend	Massachusetts–New Hampshire line To Route 119
	Greenville	5.171	8.322	NH 31 south (Fitchburg Road) – Fitchburg, MA	Southern end of concurrency with NH 31
		5.439	8.753	NH 31 north (Fitchburg Road) – Wilton	Northern end of NH 31/123 concurrency
		6.321	10.173	NH 45 north (Main Street) – Temple	Southern terminus of NH 45
	New Ipswich	7.922	12.749	NH 124 east (Turnpike Road) – Townsend, MA	Southern end of concurrency with NH 124
		9.440	15.192	NH 123A south (Main Street) – Ashby, MA	Northern terminus of NH 123A (southern segment)
		12.829	20.646	NH 124 west (Turnpike Road) – Jaffrey	Northern end of concurrency with NH 124
	Peterborough	18.971	30.531	NH 101 east (Wilton Road) – Wilton	Southern end of concurrency with NH 101
		19.835	31.921	US 202 west / NH 101 west (Wilton Road) – Keene	Northern end of concurrency with NH 101; southern end of concurrency with US 202
		22.130	35.615	NH 136 east (Greenfield Road) – Greenfield	Western terminus of NH 136
	Hancock	25.553	41.124	US 202 east (Concord Street) – Bennington, Antrim	Northern end of concurrency with US 202
		28.099	45.221	NH 137 north (Bennington Road) – Bennington, Antrim	Southern end of wrong-way concurrency with NH 137
		28.274	45.503	NH 137 south (Old Hancock Road) – Dublin, Jaffrey	Northern end of wrong-way concurrency with NH 137
Cheshire	Stoddard	35.287	56.789	NH 9 west (Franklin Pierce Highway) – Keene	Southern end of concurrency with NH 9
		36.407	58.591	NH 9 east (Franklin Pierce Highway) – Hillsborough, Concord	Northern end of concurrency with NH 9
	Marlow	44.259	71.228	NH 10 south (Gilsum Road) – Gilsum	Southern end of concurrency with NH 10
		45.273	72.860	NH 10 north – Newport	Northern end of concurrency with NH 10
	Alstead	53.979	86.871	NH 12A south (Alstead Center Road) – Surry	Southern end of concurrency with NH 12A
		54.777	88.155	NH 123A east (Acworth Road) – Acworth	Western terminus of NH 123A (northern segment)
		55.438	89.219	NH 12A north (High Street) – Langdon, Charlestown	Northern end of concurrency with NH 12A
Sullivan	No major junctions
Cheshire	Walpole	60.218	96.911	NH 12 north – North Walpole, Bellows Falls, VT	Southern end of wrong-way concurrency NH 12
		62.943	101.297	NH 12 south (Bellows Falls Road) – Westmoreland, Keene	Northern end of wrong-way concurrency with NH 12
Connecticut River		63.055 0.000	101.477 0.000	New Hampshire–Vermont state line
Windham	Westminster	0.313	0.504	US 5 to I-91 – Bellows Falls, Brattleboro	Western terminus of VT 123
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

New Hampshire Route 123A

Signage near the western end of NH Route 123A's northern segment, as viewed from NH Routes 12A/123

New Hampshire Route 123A (abbreviated NH 123A) is a designation held by two separate state highways in New Hampshire, United States. Although the two segments are not directly connected, they are linked by their parent route, New Hampshire Route 123.

References

External links

• New Hampshire State Route 123 on Flickr
• New Hampshire State Route 123A on Flickr