Portsmouth to Meredith Road Trip: Lakes and Mountains Guide

The 70-mile journey from Portsmouth to Meredith traces the path of ancient glacial meltwaters that carved New Hampshire's Lakes Region. Unlike the coastal flatlands, the terrain rises steadily from sea level to 500 feet, crossing the watershed boundary at the Alton Bay plateau. The most direct route follows NH-16 (the Spaulding Turnpike) for the first 25 miles, then NH-11 west through Alton and Gilmanton before merging onto US-3 into Meredith. Expect a 1-hour 20-minute drive without stops, but the best stops Portsmouth, NH to Meredith, NH demand at least three to five hours to fully appreciate.

• Historical note: The section through Alton was once a Native American portage trail connecting the Piscataqua River to Lake Winnipesaukee.
• Watch for fog pockets near the Merrymeeting River in Alton—a local driving quirk due to the river's cold water temperature.

NH-16 is a four-lane divided highway with a 55 mph speed limit up to Rochester, then narrows to two lanes through the woods. The road quality is excellent, freshly paved in 2023, with periodic rumble strips on curves. NH-11 west from Alton to Gilmanton is tighter—older asphalt with soft shoulders—so mind the 45 mph posted speed. US-3 into Meredith is well-maintained with a 50 mph limit. Cell service is strong for the entire route, but dead zones exist for about 3 miles near the Alton-Gilmanton line.

• Gas stops: Major stations at Portsmouth (Exit 5), Rochester (Exit 15), and Alton town center. No gas between Alton and Meredith for 28 miles—plan ahead.
• Best stop for diesel: Rochester's Pride station at 55 Farmington Road has high-flow pumps for RVs.
• Electric vehicle charging: EA station at Portsmouth Mall (16 chargers) and Alton's Nissan dealership (L2 charger, slow but free).
• Restrooms: State-owned rest areas at Mile 8 on NH-16 (northbound only) and at the Alton Bay welcome center.

The route is generally safe, but watch for deer at dusk and dawn—especially from Mile 15 to 30 on NH-16 and near the wetlands of NH-11. Most accidents are single-vehicle run-offs due to fatigue. Plan rest stops at how to find the best stops and hidden gems between cities. For families: the New Hampshire Antique and Classic Boat Museum in Meredith has interactive exhibits for kids, and the Alton Bay train depot offers a small model railroad. Pets are welcome at all state rest areas and at the outdoor seating of Moonlight Café in Meredith.

• Best kid-friendly stop: Rochester's children's playground at Spaulding Park, off NH-16.
• Pet-friendly framework: All rest stops have shade and water spigots. Meredith's town docks allow leashed dogs.
• Fatigue management: Stop every 90 minutes. The Alton Bay rest area has a picnic table and view of the lake—ideal for a 15-minute power nap.
• Infrastructure safety: NH-11 lacks guardrails in several sections; drive at posted speed in fog or rain.

The route begins in the coastal salt marshes of Great Bay—look for great blue herons stalking the edges. As you climb past Rochester, the forest transitions from red maple to white birch and hemlock. The real show starts at Alton Bay: Lake Winnipesaukee appears suddenly on your left, a 72-square-mile expanse dotted with 258 islands. Pull over at the Alton Bay public boat launch to watch the loons. From there, NH-11 winds through the Belknap Mountains, offering views of Mount Major and the Belknap Range. The town of Meredith centers on Lake Winnipesaukee's Meredith Bay, with a restored 19th-century mill district.

• Natural landmarks: Merrymeeting River Vt. Alton, Mount Major trailhead, and the Loon Preservation Centre in Meredith.
• Local commerce: Alton's farm stand, Gilmanton's antique shops, and Meredith's artisans' cooperative selling handblown glass and pottery.
• Must-see: The Olde Mill in Gilmanton sells local maple syrup and pine furniture.