The drive from Smithtown, NY to Greenfield, NY covers 224.6 miles and takes about 4h 46m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on NY 17, Long Island Expressway, Adirondack Northway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 111.7 miles on NY 17.
At current regular gas prices, budget about $36.97 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
112.3 miles from Smithtown, NY
A natural place for your longest stop of the day
, about 2h 26m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 4h 46m. Total distance: 224.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 46m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (86%). Some complex stretches to watch for.
Drive Character
This is a 4h 46m highway drive covering 224.6 miles, with most of the trip on NY 17 and Long Island Expressway. The longest continuous stretch is about 111.7 miles on NY 17.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 49 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
NY 17 is the longest continuous segment at about 111.7 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on NY 17 and Long Island Expressway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 7.6 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 33 significant decision points across 224.6 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 33.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 33.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 33 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
7.6 mi into trip|~10m in
Keep slight left at fork toward I 495 West: New York
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 495 West: New York
8
33.3 mi into trip|~46m in
Take the exit toward Cross Island Parkway, Whitestone Bridge, Kennedy Airport
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 31N-S
Toward Cross Island Parkway, Whitestone Bridge,...
10
33.5 mi into trip|~46m in
Keep slight right at fork toward Cross Island Parkway North, Whitestone Bridge
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Exit 31N
Toward Cross Island Parkway North, Whitestone B...
8
36.9 mi into trip|~51m in
Take the exit toward I 295 North: Throgs Neck Bridge, Bronx, New England
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 33
Toward I 295 North: Throgs Neck Bridge, Bronx,...
9
49.3 mi into trip|~1h 10m in
Keep slight right at fork toward NJ 4 West: Paramus
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Exit 72A
Toward NJ 4 West: Paramus
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Smithtown, NY and Greenfield, NY, road signs point toward Kennedy Airport, Cross Island Parkway North, Bronx, New England, Upper Level and Njtp South: Hackensack - among others.
Kennedy Airport
33.3 mi in|~46m
Cross Island Parkway North
33.5 mi in|~46m
Bronx
36.9 mi in|~51m
New England
36.9 mi in|~51m
Upper Level
46.6 mi in|~1h 5m|via I 95; US 1
Njtp South: Hackensack
49.1 mi in|~1h 9m
Gsp South
56.2 mi in|~1h 19m
Gsp North
56.2 mi in|~1h 19m
Newark
56.2 mi in|~1h 19m
Mahwah
56.2 mi in|~1h 19m
New York State Thruway North: Albany
71.4 mi in|~1h 39m|via NY 17
Troy
183.1 mi in|~3h 48m
Main Roads
Road
Distance
Duration
NY 17
111.7 mi
2h 8m
Long Island Expressway
24.8 mi
33m
Adirondack Northway
18.1 mi
21m
NJ 17
14.7 mi
18m
I 787
9 mi
12m
NJ 4
6.7 mi
9m
Cross Bronx Expressway
6.6 mi
8m
US 9
4.4 mi
7m
Longest stretch:
NY 17
— 111.7 mi, about 2h 8m
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithtown, NY and Greenfield, NY.
1
Start on NY 25; NY 25A
0.6 mi·51 sec·West Main Street
2
Keep slight left at fork onto NY 25; NY 25A
179 ft·5 sec·West Main Street
3
Continue on NY 25
4.0 mi·6 min·Jericho Turnpike
4
Take the ramp
0.2 mi·27 sec
Toward SM South: Bay Shore
5
Merge onto SM
1.9 mi·2 min·Sunken Meadow State Parkway
6
Continue on SA
0.8 mi·49 sec·Sagtikos State Parkway
7
Take the exit
0.1 mi·16 sec
Exit S1WToward I 495 West: New YorkUse the slight right lane.
8
Keep slight left at fork
0.2 mi·23 sec
Toward I 495 West: New YorkUse the straight / slight right lanes.
9
Turn straight onto LIE North Service Road
0.4 mi·33 sec·LIE North Service Road
10
Turn straight onto North Service Road
0.1 mi·14 sec·North Service Road
11
Take the ramp
0.2 mi·21 sec
Toward I 495 West: New York
12
Merge onto I 495
25 mi·33 min·Long Island Expressway
Use the straight / slight right lanes.
13
Take the exit
0.2 mi·27 sec
Exit 31N-SToward Cross Island Parkway, Whitestone Bridge, Kennedy AirportUse the straight / slight right lanes.
14
Keep slight right at fork
0.3 mi·38 sec
Exit 31NToward Cross Island Parkway North, Whitestone BridgeUse the slight left / slight right lanes.
15
Merge onto CI
3.1 mi·4 min·Cross Island Parkway
Use the straight / slight right lanes.
16
Take the exit
0.6 mi·1 min
Exit 33Toward I 295 North: Throgs Neck Bridge, Bronx, New EnglandUse the straight / slight right lanes.
17
Merge onto I 295
1.8 mi·3 min·Throgs Neck Bridge
18
Continue on I 295
0.7 mi·1 min·Throgs Neck Expressway
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 295
6.6 mi·8 min·Cross Bronx Expressway
Use the straight / slight right lanes.
20
Keep slight left at fork onto I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
Toward Upper Level
21
Continue on I 95; US 1
0.6 mi·59 sec·George Washington Bridge (upper level)
22
Continue on I 95 EXPR; US 1 EXPR; US 9 EXPR
0.5 mi·48 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
23
Keep slight left at fork onto I 95 EXPR; US 1 EXPR; US 9 EXPR
0.6 mi·39 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
Use the straight / slight right lanes.
24
Keep slight left at fork onto I 95 EXPR; NJTP
0.1 mi·8 sec·I 95 EXPR; NJTP
25
Take the exit
0.2 mi·22 sec
Toward I 95 South, NJTP South: HackensackUse the straight / slight right lanes.
26
Keep slight right at fork
0.2 mi·23 sec
Exit 72AToward NJ 4 West: ParamusUse the slight left / slight right lanes.
27
Merge onto NJ 4
6.7 mi·9 min·NJ 4
Use the slight right lane.
28
Take the exit
0.2 mi·26 sec
Toward GSP South, NJ 17 South, GSP North, NJ 17 North: Grand State Plaza, Newark, MahwahUse the straight lane.
29
Keep slight right at fork
0.2 mi·36 sec
Toward NJ 17 North: MahwahUse the straight / slight right lanes.
30
Merge onto NJ 17
3.3 mi·4 min·NJ 17
Use the straight / slight right lanes.
31
Continue on NJ 17
7.3 mi·9 min·NJ 17
Use the straight / right lanes.
32
Continue on NJ 17
0.7 mi·50 sec·NJ 17
33
Continue on NJ 17
3.3 mi·4 min·NJ 17
34
Continue on I 287; NY 17
0.2 mi·10 sec·I 287; NY 17
35
Keep slight left at fork onto NY 17
112 mi·2 hr 8 min·NY 17
Toward I 87 North, NY 17 North, New York State Thruway North: AlbanyUse the straight / slight right lanes.
36
Take the exit
0.3 mi·50 sec
Exit 23Toward I 787, US 9W: Albany, TroyUse the slight right lane.
37
Continue on I 787
9.0 mi·12 min·I 787
Use the straight / slight right lanes.
38
Keep slight left at fork onto NY 787
0.4 mi·29 sec·NY 787
39
Take the exit
0.3 mi·50 sec
Exit 9WToward NY 7 West: Schenectady, Saratoga SpringsUse the right lane.
40
Merge onto NY 7
3.1 mi·3 min·NY 7
41
Take the exit
0.8 mi·1 min
Toward I 87 North: Saratoga Springs, Glens Falls
42
Merge onto I 87
18 mi·21 min·Adirondack Northway
43
Take the exit
0.4 mi·1 min
Exit 13NToward US 9 North: Saratoga Springs
44
Turn straight onto US 9
4.4 mi·7 min·US 9
45
Turn left onto NY 9N
2.8 mi·5 min·Church Street
46
Continue on NY 9N
0.1 mi·15 sec·Route 9N
47
Turn left onto CR 21
1.3 mi·1 min·Middle Grove Road
48
Turn right onto South Greenfield Road
0.6 mi·58 sec·South Greenfield Road
49
Arrive at destination
South Greenfield Road
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 112.3 miles from Smithtown, NY, or about 2h 26m into the drive.
The longest continuous stretch on this route runs about 111.7 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 49 miles or 1h 9m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 112.3 miles or 2h 26m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 50m
Traffic, exits, and arrival timing usually matter more near Greenfield, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Smithtown, NY so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Smithtown, NY
This is one driving day of about 224.6 miles and 4h 46m.
Your first comfortable stop window is around 49 miles from Smithtown, NY.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on NY 17 for about 111.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 112.3 mi from Smithtown, NY
· 2h 26m into the drive
The midpoint is around 112.3 miles from Smithtown, NY, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before NY 17 if your tank is already low. That segment runs about 111.7 miles.
Arriving in Greenfield, NY
The final approach into Greenfield, NY usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Greenfield, NY.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Hamilton Grange National Memorial
National Memorial
Merchant’s clerk, Revolutionary War soldier, first Secretary Treasury of the United States: Alexander Hamilton’s life is memorialized at The Grange, the home he built on a country estate in uptown Man...
The final resting place of President Ulysses S. Grant and his wife, Julia, is the largest mausoleum in North America. It testifies to a people’s gratitude for the man who ended the bloodiest conflict...
In 1777, a large British invasion force met an equally large American army here at Saratoga. After two intense battles, an eight-mile retreat, and a three-day siege, British General John Burgoyne surr...
9 mi from route
~21 min detour
Free
near mile 216.8
Before the 1960s, almost everything about living authentically as a lesbian, a bisexual person or a gay man was illegal. The Stonewall Uprising on June 28, 1969 is a milestone in the quest for civil r...
9 mi from route
~21 min detour
Free
near mile 46.5
The African Burial Ground stands as the oldest and largest known excavated burial site in North America for both free and enslaved Africans. It offers a profound testament to the enduring legacy of Af...
10 mi from route
~25 min detour
Free
near mile 46.5
Here at Federal Hall, George Washington took the oath of office as the first President of the United States, marking the beginning of the American constitutional republic. This historic site served as...
10 mi from route
~26 min detour
Free
near mile 46.5
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$36.97 one way
$73.94 round trip
$4.18/gal25.4 MPG avg79 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.52
$39.98
$79.95
premium
$4.92
$43.53
$87.06
diesel
$5.61
$49.59
$99.18
Estimated Tolls: $22.83
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
Jericho Turnpike
(4 mi)$0.28
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
$37
Tolls
$23
Meals
$25–$50
Total
$85–$110
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 78.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $24 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
67.4
0
$23.58
$10.78
Efficient EV
56.2
0
$19.65
$8.98
EV Truck/SUV
89.8
1
$31.44
$14.37
Gas CO2
79 kg
EV CO2
26 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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 Apr 16, 2026
Origin
Smithtown, NY
Late night
in Smithtown on Friday
Local time
3:08 AM
EDT
Current temp
64°F
Unavailable
Live forecast
Destination
Greenfield, NY
Late night
in Greenfield on Friday
Local time
3:08 AM
EDT
Current temp
31°F
Unavailable
Live forecast
57°F
Ramapo, NY
112 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
33 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
4h 46m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Smithtown, NY to Greenfield, NY covers 224.6 miles and takes about 4h 46m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are NY 17, Long Island Expressway, Adirondack Northway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 112.3 miles from Smithtown, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $36.97 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 33 significant decision points across 224.6 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 33.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 33.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Smithtown, NY and Greenfield, NY, road signs point toward Kennedy Airport, Cross Island Parkway North, Bronx, New England, Upper Level and Njtp South: Hackensack - among others.
Yes. Nearby national parks include Hamilton Grange National Memorial, General Grant National Memorial and Saratoga National Historical Park. There are 6 parks within detour distance of this route.
Data sources
The figures on this page are computed from open government and mapping datasets, not crowdsourced reviews. Distances and geometry come from
OSRM
over
OpenStreetMap.
Fuel cost uses
EIA
weekly regional averages.
National park proximity is from the
NPS API.
Full methodology, refresh cadence, and limitations are documented on the
methodology page.
