Portsmouth to Sanbornton is 66.3 miles and takes about 1 hour 40 minutes via US 4, with a fuel budget near $12 and enough daylight to finish in a day. This trip stays within New Hampshire, moving from the Northeast region further north within the state. Most of the drive is on highways, offering a straightforward way to get from the coast to inland areas. Consider this route if you're looking for an efficient, relatively short drive with minimal fuss.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
33.1 miles from Portsmouth, NH
A natural place for your longest stop of the day
, about 54m into the drive
.
Main Roads
Road
Distance
Duration
US 4
16.7 mi
19m
Dover Road
9.2 mi
15m
Piscataqua Road
8.8 mi
13m
First New Hampshire Turnpike
7.8 mi
12m
Old Turnpike Road
5.1 mi
7m
I 393
4.6 mi
6m
Spaulding Turnpike
3.8 mi
5m
Sanborn Road
2.5 mi
4m
Longest stretch:
US 4
— 16.7 mi, about 19m
Traffic on I-93
Hour-of-day weekday pattern from 6 FHWA count stations on your route.
Peak
4 PM
~2,242 veh/hr typical
· worst 2,809
Quietest
2 AM
~72 veh/hr
Peak-to-quiet ratio
31.1×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 50 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Portsmouth, NH and Sanbornton, NH.
1
Start on US 1
0.2 mi·34 sec·Congress Street
Use the straight lane.
2
Turn right onto Maplewood Avenue
0.7 mi·2 min·Maplewood Avenue
Use the right lane.
3
Turn left onto Cutts Street
455 ft·15 sec·Cutts Street
4
Turn slight right onto US 1 Bypass
0.6 mi·1 min·US 1 Bypass
5
Continue on NH 16
0.4 mi·50 sec·NH 16
Toward NH 16 North: Concord, Rochester
6
Take the exit onto NH 16
0.2 mi·14 sec·NH 16
7
Keep slight left at fork onto NH 16
0.3 mi·21 sec·NH 16
Toward Spaulding Turnpike North, NH 16 North, US 4 WestUse the straight lane.
8
Merge onto US 4; NH 16
3.8 mi·5 min·Spaulding Turnpike
9
Take the exit onto US 4
0.3 mi·38 sec·US 4
Exit 6Toward US 4: Dover Point Road, Durham-UNH, ConcordUse the slight right lane.
10
Keep slight left at fork onto US 4
237 ft·7 sec·US 4
Exit 6Toward US 4: Durham-UNH, ConcordUse the left lane.
11
Turn left onto US 4
0.3 mi·52 sec·US 4
Use the straight lane.
12
Enter roundabout onto US 4
121 ft·2 sec·Boston Harbor Road
13
Continue on US 4
0.2 mi·21 sec·Boston Harbor Road
14
Continue on US 4
0.2 mi·27 sec·Scammell Bridge
15
Continue on US 4
8.8 mi·13 min·Piscataqua Road
16
Enter roundabout onto US 4
158 ft·4 sec·Concord Road
17
Continue on US 4
0.5 mi·55 sec·Concord Road
18
Continue on US 4
1.8 mi·2 min·Old Concord Turnpike
19
Continue on US 4
5.1 mi·7 min·Old Turnpike Road
Use the straight lane.
20
Continue on US 4
7.8 mi·12 min·First New Hampshire Turnpike
Use the right lane.
21
Continue on US 4; US 202; NH 9; NH 107
4.3 mi·7 min·Dover Road
Use the straight / right lanes.
22
Enter roundabout onto US 4; US 202; NH 9
265 ft·6 sec·Dover Road
23
Continue on US 4; US 202; NH 9
4.9 mi·7 min·Dover Road
Use the left / straight / right lanes.
24
Keep slight right at fork onto I 393; US 4; US 202
Given this is a drive of under two hours, leaving anytime in the morning or early afternoon should allow you to reach Sanbornton with plenty of daylight. There's no need to break this drive up, so you can leave when you're ready and enjoy the flexibility. The estimated fuel cost is around $12, so factor that into your budget. Keep an eye on your fuel gauge as you approach the end of the 16.7-mile stretch on US 4, as it’s the longest segment before potential stops.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 33.1 miles from Portsmouth, NH, or about 54m into the drive.
The longest continuous stretch on this route runs about 16.7 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 15 miles or 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 33.1 miles or 54m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 26m
Traffic, exits, and arrival timing usually matter more near Sanbornton, NH than in the middle of the route.
Before You Leave
+
Open the route before leaving Portsmouth, NH so your first major turns are already loaded.
Day 1
Settle into the route from Portsmouth, NH
This is one driving day of about 66.3 miles and 1h 40m.
Your first comfortable stop window is around 15 miles from Portsmouth, NH.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on US 4 for about 16.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 21
5 decision points cluster between mile 0.2 and 63.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.2 mi into trip|~0m in|Maplewood Avenue
Turn right onto Maplewood Avenue
Lane positioning matters here
Use the right lane.
9
2.2 mi into trip|~5m in|NH 16
Keep slight left at fork onto NH 16 toward Spaulding Turnpike North, NH 16 North, US 4 West
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight lane.
Toward Spaulding Turnpike North, NH 16 North, U...
8
6.3 mi into trip|~10m in|US 4
Take the exit onto US 4 toward US 4: Dover Point Road, Durham-UNH, Concord
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 6
Toward US 4: Dover Point Road, Durham-UNH, Conc...
10
6.6 mi into trip|~11m in|US 4
Keep slight left at fork onto US 4 toward US 4: Durham-UNH, Concord
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the left lane.
Exit 6
Toward US 4: Durham-UNH, Concord
6
63.2 mi into trip|~1h 33m in
Take the exit toward US 3, NH 11, NH 132, NH 140: Laconia, Tilton
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$12
Tolls
$1
Meals
$25–$50
Total
$38–$63
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 23.2 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $7 in charging
· 0 stops
· 65% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
19.9
0
$6.96
$3.18
Efficient EV
16.6
0
$5.80
$2.65
EV Truck/SUV
26.5
0
$9.28
$4.24
Gas CO2
23 kg
EV CO2
8 kg (65% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of May 31, 2026
Origin
Portsmouth, NH
Afternoon
in Portsmouth on Wednesday
Local time
3:54 PM
EDT
Current temp
67°F
Mostly Cloudy then Chance Showers And Thunderstorms
SW 5 mph64% chanceLive forecast
Destination
Sanbornton, NH
Afternoon
in Sanbornton on Wednesday
Local time
3:54 PM
EDT
Current temp
63°F
Scattered Showers And Thunderstorms
NW 10 mph53% chanceLive forecast
52°F
Northwood, NH
33 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
4 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 40m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
With 62% of the drive on highways, you'll spend a good portion of your time on faster roads. The longest stretch without a significant change in direction is 16.7 miles on US 4. You'll transition from highway cruising to surface roads as you approach your destination, so be prepared for more frequent exits and potentially more local traffic as you get closer to Sanbornton.
62% highway — fuel and pacing are the main things to plan.
33 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 16.7 mi on US 4.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on US 4 and Dover Road. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.2 miles in near Maplewood Avenue.
Driving Effort10/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 66.3 miles you will encounter 21 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (Maplewood Avenue): Lane positioning matters here; at 2.2 miles (NH 16): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.3 miles (US 4): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
791 ft24 ft
Total Climb
1,252 ft
Total Descent
491 ft
Highest Point
791 ft
~66.3 mi in
Elevation Range
766 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Portsmouth, NH and Sanbornton, NH, road signs point toward Durham-Unh and Concord.
Doable as a same-day drive at 1h 40m. Total distance: 66.3 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 40m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (62%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 16.7 miles on US 4. The full list of main roads is in the Roads section above.
Expect about $1.29 in tolls one way, starting with First New Hampshire Turnpike. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
Yes — we found about 2 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Sanbornton, NH before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
Mostly yes along the main roads, but rural stretches through NH can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.2 miles (Maplewood Avenue): Lane positioning matters here; at 2.2 miles (NH 16): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.3 miles (US 4): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes. A round trip is manageable in a single day if you plan a break at Sanbornton, NH before heading back.
