The state highway heads north and then west through a hilly area where it briefly passes through the town of Ashland before returning to Holderness.

NH 175 enters the valley of the Pemigewasset River and passes by the historic Trinity Church and near the Holderness School and the Chapel of the Holy Cross.

The highway passes under I-93, has two crossings of the Pemigewasset River, and intersects Tripoli Road, which has a diamond interchange with I-93 immediately to the east.

NH 175 has an oblique grade crossing of the Hobo Railroad before crossing the river a third time on a truss bridge and reaching its northern terminus at US 3 (Daniel Webster Highway) just south of the community of North Woodstock.

The highway passes through the athletic complex of the university before reaching its four-ramp partial cloverleaf interchange with I-93.