Question: What passes through Lyme, New Hampshire and is the longest hiking-only trail in the world?

Context paragraphs:
New England National Scenic Trail: The New England National Scenic Trail (NET) is a National Scenic Trail in southern New England, which includes most of the three single trails Metacomet-Monadnock Trail, Mattabesett Trail and Metacomet Trail.  After the Metacomet-Monadnock-Mattabesett trail system, the trail is sometimes called the Triple-M Trail.  The 215 mi route extends through 41 communities from Guilford, Connecticut at Long Island Sound over the Metacomet Ridge, through the highlands of the Pioneer Valley of Massachusetts, to the New Hampshire state border.  (The remainder of the M-M Trail to the summit of Mount Monadnock in southern New Hampshire is not included in the designation.)  This includes a now (2013) complete connector trail (the Menunkatuck Trail) from the southernmost location of the Mattabesett Trail (in northern Guilford, Connecticut) to the sea (Long Island Sound) and a deviation of the Metacomet-Monadnock Trail in Massachusetts, to lead the trail through state-owned land instead of largely unprotected land.

Lyme Center, New Hampshire: Lyme Center is an unincorporated community in the town of Lyme in Grafton County, New Hampshire, in the United States.  It is located close to the geographic center of the town of Lyme, approximately 2 mi east of New Hampshire Route 10 where it passes through the main village of Lyme.  The center of the village is listed on the National Register of Historic Places as the Lyme Center Historic District.

Lyme, New Hampshire: Lyme is a town along the Connecticut River in Grafton County, New Hampshire, United States.  The population was 1,716 as of the 2010 census, with an estimated population of 1,680 in 2015.  Lyme is home to the Chaffee Natural Conservation Area.  The Dartmouth Skiway is in the eastern part of town, near the village of Lyme Center.  The Appalachian Trail passes through the town's heavily wooded eastern end.

Appalachian Trail: The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the A.T., is a marked hiking trail in the Eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine.  The trail is about 2,200 miles (3,500 km) long, though the exact length changes over time as parts are modified or rerouted.  The Appalachian Trail Conservancy claims that the Appalachian Trail is the longest hiking-only trail in the world.  More than 2 million people are said to do at least one day-hike on the trail each year.

Moose Mountain (New Hampshire): Moose Mountain is an 8 mi -long ridge located in the eastern part of the town of Hanover in Grafton County, New Hampshire.  The mountain is flanked to the north by Holts Ledge, at 2110 ft , and to the south (across Mascoma Lake) by Shaker Mountain, at 1690 ft .  It is traversed by the Appalachian Trail, a 2170 mi National Scenic Trail from Georgia to Maine.  Moose Mountain is outside the White Mountain National Forest, but the trail runs through a narrow corridor along the ridge which is administered by the U.S. Forest Service.  The trail can be accessed from the south along Three Mile Road in Hanover, and from the north along Goose Pond Road in Lyme, New Hampshire.

Lyme Common Historic District: The Lyme Common Historic District encompasses the original historic center of Lyme, New Hampshire.  The centerpiece of the 80 acre district is the oblong town common, a flat, grassy expanse extending east-west just south of a bend in Main Street (New Hampshire Route 10), whose visual anchor, the First Congregational Church, stands at the eastern end.  The district extends along NH 10 north as far as High Street, and south a short distance beyond the common area.  The common area only began to take shape in 1781, after a meeting house (now the Nichols Store) was built in 1781.  This resulted in the construction of a significant number of Federal and Greek Revival houses between 1790 and about 1820.  The First Congregational Church was built c. 1810, at which time the horse sheds behind it were also built; these are believed to be the longest such surviving row in the state.  The other major building boom in the area was in 1840-65, the years preceding the American Civil War.  There are some 20th century Colonial Revival structures, and later new construction (and replacement of old) has generally been sympathetic to the extant styles.

Hanover High School (New Hampshire): Hanover High School is the only public high school in the Dresden School District, in Hanover, New Hampshire, USA.  In 1963 it became the first interstate high school in the country as part of a bill that was the last ever signed into action by John F. Kennedy.  Today it accepts students from several communities in New Hampshire and Vermont.  Enrollment is approximately 786 students, the majority of whom come from the towns of Hanover (New Hampshire) and Norwich, Vermont.  11% of the student body attends on a tuition basis from towns such as Cornish and Lyme, New Hampshire, and Strafford and Hartland, Vermont.  The school employs 79 full-time faculty members.

Lyme Center Historic District: The Lyme Center Historic District encompasses a modest crossroads and industrial village in rural Lyme, New Hampshire.  The predominantly residential district stretches along Dorchester Road, on either side of its junction with Baker Hill Road.  The village's rise in development started in the early 19th century as it was at a crossroads of the east-west Dorchester Road, and the north-south Baker Hill Road and Acorn Hill Road.  The village grew rapidly in the 1820s, with a number of simple Greek Revival houses, and in 1830 the Baptist Church was built.  The other major civic building in the village is the Lyme Academy, built in 1839, albeit with more Federal than Greek Revival styling.  Grant Brook, which runs parallel to Dorchester Road, provided a source of power for the growth of small industrial efforts, including a sawmill (of which only foundations remain) at the corner of Dorchester and Baker Hill Roads.  This industry provided a second minor building boom in the late 19th to early 20th century.  Most of the houses in the district are vernacular Greek Revival or Cape in their styling; probably the most elaborate Greek Revival house is the 1857 Beal-Pike House at 41 Dorchester Road.

Smarts Mountain: Smarts Mountain is a 3238 ft mountain in the town of Lyme in Grafton County, New Hampshire, United States.  Smarts is flanked to the north by Mount Cube, at 2909 ft , and to the southwest by Holts Ledge, at 2110 ft .  Although of only moderate elevation, Smarts is separated from the southwestern White Mountains by Oliverian Notch, a fairly low pass traversed by New Hampshire Route 25 southwest of Mount Moosilauke.  That gives Smarts a relative height of 2190 ft , which makes it one of twelve mountains in New Hampshire with a prominence over 2000 ft .

Vermont Route 113: Vermont Route 113 is a state highway in eastern Vermont in the United States.  It runs south and east from an intersection with Vermont Route 110 in Chelsea to the New Hampshire border in Thetford.  VT 113 crosses the Connecticut River, becoming East Thetford Road, an unnumbered local road in the town of Lyme, New Hampshire which connects to New Hampshire Route 10.

Supporting paragraphs: Lyme, New Hampshire Appalachian Trail
Answer: Appalachian Trail