New Hampshire Route 25 begins at the state border, on the western bank of the
Connecticut River, where it continues west as VT 25. It crosses the river on a metal
truss bridge and enters the town of
Piermont. Upon reaching Four Corners near the center of Piermont, NH 25 turns north to form a concurrency with
NH 10, while the roadway continues east through the intersection as NH 25C, a more direct but rugged route to the town of
Warren. Heading north along with NH 10 parallel to the Connecticut River, NH 25 is known locally as Dartmouth College Highway. Upon entering the town of
Haverhill, in Haverhill Village, NH 25 leaves the concurrency along Mount Moosilauke Highway, paralleling
Oliverian Brook. is a prominent landmark at the Warren Town Common along NH 25. Upon leaving Haverhill Village, NH 25 passes through the communities of
Pike and East Haverhill, the location of the
Oliverian School, before entering the town of
Benton. NH 25 crosses the southwestern corner of Benton, but lacks any road connection to the rest of the town. To the northeast of the road sits the western end of the
White Mountain chain, with
Mount Moosilauke rising prominently. The road bends to the south and enters the town of Warren in the village of
Glencliff. Winding southwards, the route merges with
Route 118 to pass through the main village of Warren. The two conjoined routes parallel the
Baker River, crossing it several times before entering
Wentworth. In Wentworth, NH 25/NH 118 meets the eastern terminus of NH 25A, which connects to the towns of
Orford, New Hampshire, and
Fairlee, Vermont. Turning gently towards the southeast, NH 25/NH 118 passes by the
Plummer's Ledge Natural Area and enters the town of
Rumney. NH 118 leaves to the southwest upon entering Rumney, and NH 25 continues southeastward, passing the villages of West Rumney, Rumney Depot, and Quincy. Nearby attractions include Rumney Rocks, a popular
rock climbing venue, and
Polar Caves Park, a series of glacial caves. Still following the Baker River, NH 25 enters the town of
Plymouth, meeting
NH 3A at a traffic circle in the village of West Plymouth. 3A merges from the south and the two routes head east along Tenney Mountain Highway. At the northern edge of
Plymouth Village, there is a brief freeway interchange where NH 25 east merges with
US 3 south, while the roadway continues on a short while before merging with an interchange on
I-93 (exit 26). The interchange marks the northern end of NH 3A. 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 at the town common. 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. Entering the town of
Holderness, there is an intersection with the southern end of
NH 175 and the road curves to the east to follow the shore of Little Squam Lake. Passing between Little Squam Lake and
Squam Lake, the two routes meet the southern terminus of
NH 113 and pass by the main village of Holderness and the
Squam Lakes Natural Science Center. After curving to the southeast, the routes pass through the village of East Holderness and pass into the town of
Center Harbor. Shortly after entering town, NH 25/US 3 turns to a more southerly direction, while NH 25B has its western terminus. NH 25B provides a much more direct route for travellers continuing on NH 25, as the main route loops southward into the town of
Meredith. In
Meredith Village, at the tip of Meredith Bay on
Lake Winnipesaukee, NH 25 leaves its long concurrency with US 3, turning sharply to the northeast along Main Street/Whittier Highway. Passing
Inter-Lakes Middle High School, NH 25 turns northward when it meets the shores of Lake Winnipesaukee main axis, known as The Broads, and passes into Center Harbor a second time. After re-entering Center Harbor, NH 25 meets the eastern end of NH 25B at the central business district of Center Harbor at the northern tip of the main axis of Lake Winnipesaukee, and heads east into
Moultonborough. Passing by a number of the smaller lakes that give New Hampshire's
Lakes Region its name, NH 25 travels northeast, having a brief concurrency with
NH 109 in Moultonborough Village, turns northwards and passes
Moultonborough Airport, then passes through the East Sandwich portion of the town of
Sandwich. Turning to the east, NH 25 next enters the town of
Tamworth, merging with
NH 113 at Bennett Corners. The two routes run concurrently eastwards along the south bank of the
Bearcamp River into the village of Whittier, where NH 113 leaves to the north. Within Tamworth, NH 25 is known as Bearcamp Highway. Bending to the southeast, NH 25 enters
Ossipee. In
West Ossipee, NH 25 (now known as Ossipee Mountain Highway) passes near the historic
Whittier Bridge before crossing over the Bearcamp River and coming to a T-intersection with
NH 16 and joining it southbound along White Mountain Highway. Heading southeast past the western shore of
Ossipee Lake, there are two intersections with NH 16B before NH 25 leaves White Mountain Highway to the northeast at an interchange in
Center Ossipee. Passing through the Ossipee Lake Natural Area south of Ossipee Lake, NH 25 crosses into
Effingham, passing through the village of Effingham Falls along a brief concurrency with
NH 153, then crossing the
Ossipee River into the town of
Freedom, New Hampshire. Now following the northern bank of the Ossipee River, NH 25 reaches its eastern terminus at the Maine border, with the roadway continuing into the town of
Porter, Maine, as
Maine Route 25. ==History==