NH 107 between US 3 and Leavitt Road in Laconia is part of the Timberman 70.3 Triathlon bicycle course.

The highway intersects the eastern terminus of NH 102 before turning due north.

The highway continues northwest into Epsom where it intersects with US 4, US 202 and NH 9 in the eastern end of town.

NH 107 crosses the town of Pittsfield through windy, hilly terrain before reaching the downtown area.

The highway runs briefly through the western corner of the town before continuing northwest into Gilmanton, where it meets the eastern terminus of NH 129, a connector to Loudon to the southwest.

Continuing north, NH 107 traverses the eastern corner of Belmont before entering the city of Laconia.

NH 107 (and US 3 Business) continue north on Union Avenue, paralleling Opechee and Paugus bays before reaching its northern terminus at US 3 (Lake Street/Lake Shore Road) at the Laconia/Gilford line (US 3 Business also ends here).

[3] Province Road began the great era of roadbuilding in New Hampshire, a dream of Governor John Wentworth, which had to wait until the end of the French and Indian Wars.

NH 107A begins at the Massachusetts border in South Hampton as Main Avenue.