Now cosigned with US 3, NH 25 heads south along the western bank of the Pemigewasset River through Plymouth Village along Main Street, passing Plymouth State University and by a commercial district south of the university campus. In the center of the university campus there is an intersection with NH 175A, a short connector bridging the Pemigewasset and providing access to I-93 (exit 25) and NH 175. After leaving Plymouth Village, NH 25 and US 3 travel through a more rural area of Plymouth before crossing the extreme northern corner of the town of Bridgewater. After crossing the Pemigewasset into Ashland, there is an interchange with I-93 (Exit 24) and the conjoined routes turn east into Ashland Village along Daniel Webster Highway, intersect NH 132 at Main Street and Highland Street, and turn north along the western shore of Little Squam Lake.