Islip, NY to Fort Montgomery, NY is 87.6 miles and takes about 1 hour 58 minutes via Palisades Interstate Parkway, Southern State Parkway, and Cross Bronx Expressway, with a fuel budget near $16 and enough daylight to finish in a day. This trip stays within New York, traversing the Northeast region. Expect a primarily highway experience, ideal for those looking for an efficient drive. With a recommended one-day duration, you can comfortably reach your destination without needing an overnight stay.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
43.8 miles from Islip, NY
A natural place for your longest stop of the day
, about 1h 1m into the drive
.
Main Roads
Road
Distance
Duration
Palisades Interstate Parkway
37.4 mi
47m
Southern State Parkway
24.7 mi
31m
Cross Bronx Expressway
6.6 mi
8m
Clearview Expressway
5 mi
5m
Throgs Neck Bridge
2 mi
3m
Main Street
1.8 mi
3m
Cross Island Parkway
1.3 mi
1m
Hempstead Avenue
1 mi
2m
Longest stretch:
Palisades Interstate Parkway
— 37.4 mi, about 47m
Traffic on I-95
Hour-of-day weekday pattern from 13 FHWA count stations on your route.
Peak
7 AM
~4,026 veh/hr typical
Quietest
2 AM
~1,234 veh/hr
Peak-to-quiet ratio
3.3×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 21 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 Islip, NY and Fort Montgomery, NY.
1
Start on NY 27A
0.8 mi·1 min·Main Street
2
Continue on Montauk Highway
0.2 mi·19 sec·Montauk Highway
3
Continue on NY 27A
1.1 mi·1 min·Main Street
4
Turn right onto 3rd Avenue
0.6 mi·1 min·3rd Avenue
5
Continue on CR 57
0.3 mi·36 sec·Rossevelt Street
6
Continue on CR 57
0.7 mi·1 min·Howells Road
Use the left lane.
7
Turn straight onto Sunrise Highway
163 ft·3 sec·Sunrise Highway
8
Keep slight right at fork onto CR 57
0.3 mi·36 sec·Howells Road
Toward Howells Road, Deer ParkUse the right lane.
9
Continue on CR 57
0.6 mi·1 min·Bay Shore Road
10
Take the ramp
0.1 mi·19 sec
Toward SO West: New York
11
Continue on this road
363 ft·8 sec·this road
12
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / right lanes.
13
Take the exit
0.3 mi·43 sec
Toward Cross Island Parkway North, Whitestone BridgeUse the slight right lane.
14
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
15
Take the exit
317 ft·9 sec
Exit 26BToward NY 24: UBS Arena-Belmont ParkUse the slight right lane.
16
Keep slight left at fork
437 ft·12 sec
Toward NY 24 West: Hempstead AvenueUse the slight left / slight right lanes.
17
Keep slight right at fork
0.1 mi·15 sec
Toward Cross Island Parkway North, Hempstead Avenue West
18
Keep slight right at fork
266 ft·8 sec
Toward Hempstead Avenue WestUse the slight left / slight right lanes.
19
Continue on this road
0.1 mi·13 sec·this road
Toward Grandstand, Hempstead Avenue West
20
Keep slight left at fork
100 ft·4 sec
Toward Hempstead Avenue
21
Turn right onto NY 24
1.0 mi·2 min·Hempstead Avenue
Use the right lane.
22
Turn left onto Jamaica Avenue
0.1 mi·17 sec·Jamaica Avenue
23
Turn right onto NY 24
0.7 mi·1 min·212th Street
24
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Toward I 295 North: Clearview Expressway, Through Neck BridgeUse the straight / slight right lanes.
25
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
26
Continue on I 295
0.7 mi·1 min·Throgs Neck Expressway
Use the straight / slight right lanes.
27
Keep slight left at fork onto I 295
6.6 mi·8 min·Cross Bronx Expressway
Use the straight / slight right lanes.
28
Keep slight left at fork onto I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
Toward Upper Level
29
Continue on I 95; US 1
0.6 mi·59 sec·George Washington Bridge (upper level)
30
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
31
Keep slight right at fork onto Palisades Interstate Parkway
37 mi·47 min·Palisades Interstate Parkway
Exit 74Toward Palisades ParkwayUse the straight / slight right lanes.
32
Enter roundabout onto US 9W
528 ft·7 sec·US 9W
33
Continue on US 9W
0.8 mi·1 min·US 9W
34
Arrive at destination
US 9W
Trip Plan
To make the most of this 1 hour 58 minute drive, consider leaving Islip mid-morning to avoid peak commuter traffic. Since it's a relatively short trip, you won't need to worry about splitting it up with overnight stays. The fuel cost is estimated at $16, so ensure you have enough gas before departing. Keep an eye out for the transition points between the parkways and the expressway, as traffic patterns can change quickly. There are no specific stops recommended, so you can adjust your schedule as needed.
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 43.8 miles from Islip, NY, or about 1h 1m into the drive.
The longest continuous stretch on this route runs about 37.4 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 19 miles or 27m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 43.8 miles or 1h 1m 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 41m
Traffic, exits, and arrival timing usually matter more near Fort Montgomery, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Islip, NY so your first major turns are already loaded.
Day 1
Settle into the route from Islip, NY
This is one driving day of about 87.6 miles and 1h 58m.
Your first comfortable stop window is around 19 miles from Islip, NY.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on Palisades Interstate Parkway for about 37.4 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 19
5 decision points cluster between mile 3.6 and 49.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
9
3.6 mi into trip|~6m in|CR 57 / Howells Road
Keep slight right at fork onto CR 57 / Howells Road toward Howells Road, Deer Park
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward Howells Road, Deer Park
7
29.4 mi into trip|~40m in
Take the exit toward Cross Island Parkway North, Whitestone Bridge
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward Cross Island Parkway North, Whitestone B...
8
31.1 mi into trip|~43m in
Keep slight left at fork toward NY 24 West: Hempstead Avenue
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward NY 24 West: Hempstead Avenue
8
31.2 mi into trip|~43m in
Keep slight right at fork toward Hempstead Avenue West
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward Hempstead Avenue West
8
49.3 mi into trip|~1h 9m in|Palisades Interstate Parkway
Keep slight right at fork onto Palisades Interstate Parkway toward Palisades Parkway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 74
Toward Palisades Parkway
Fuel & Cost
Regular Gas
$15.55 one way
$31.09 round trip
$4.51/gal25.4 MPG avg31 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.85
$16.71
$33.43
premium
$5.24
$18.07
$36.14
diesel
$5.35
$18.45
$36.90
Estimated Tolls: $22.55
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
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
$16
Tolls
$23
Meals
$25–$50
Total
$63–$88
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 30.6 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $9 in charging
· 0 stops
· 68% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
26.3
0
$9.20
$4.20
Efficient EV
21.9
0
$7.67
$3.50
EV Truck/SUV
35
0
$12.26
$5.61
Gas CO2
31 kg
EV CO2
10 kg (68% 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 10, 2026
Origin
Islip, NY
Afternoon
in Islip on Wednesday
Local time
4:05 PM
EDT
Current temp
67°F
Slight Chance Rain Showers
S 8 mph21% chanceLive forecast
Destination
Fort Montgomery, NY
Afternoon
in Fort Montgomery on Wednesday
Local time
4:05 PM
EDT
Current temp
75°F
Unavailable
Live forecast
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
8 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 58m 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.
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...
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 48.4
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 48.4
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 48.4
Located at the southern tip of Manhattan, Castle Clinton marks the place where New York City began and reflects the growth of both the city and the nation. Built to defend the harbor during the War of...
11 mi from route
~27 min detour
Free
near mile 48.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This is a largely highway route, with 89% of the drive on major roadways. You'll experience a longest stretch of 37.4 miles on the Palisades Interstate Parkway before encountering surface roads. Be prepared for urban merging and dense exits, particularly as you navigate the Cross Bronx Expressway. The majority of your time will be spent cruising on well-maintained parkways and expressways.
89% highway — fuel and pacing are the main things to plan.
34 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 37.4 mi on Palisades Interstate Parkway.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on Palisades Interstate Parkway and Southern State Parkway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3.6 miles in near CR 57 / Howells Road.
Driving Effort9/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 87.6 miles you will encounter 19 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 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 29.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Gently rolling terrain
768 ft0 ft
Total Climb
1,199 ft
Total Descent
1,050 ft
Highest Point
768 ft
~81.4 mi in
Elevation Range
768 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Fort Montgomery, NY, road signs point toward So West: New York, Cross Island Parkway North, Hempstead Avenue West, Grandstand and Upper Level.
Islip (pronounced "ICE-lip") is a town on Long Island in the state of New York. Located within Suffolk County, the Town of Islip includes the villages of Brightwaters, Islandia, Ocean Beach and Saltaire. It also includes numerous hamlets including Bay Shore and Sayville which are ferry terminals for Fire Island. Other prominent communities are Bayport, Brentwood, Central Islip, Hauppauge, Islip village (the town seat), and Ronkonkoma.
Top landmarks
•Bayport Aerodrome — airport in Suffolk County, New York, United States
•Connetquot River State Park Preserve — state park in New York
•Modesty — oyster-dredging sloop built in Long Island
Doable as a same-day drive at 1h 58m. Total distance: 87.6 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 58m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (89%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 37.4 miles on Palisades Interstate Parkway. The full list of main roads is in the Roads section above.
Expect about $22.55 in tolls one way, starting with George Washington Bridge. 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 1 rest area or service plaza 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 Fort Montgomery, NY 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.
The main spots that need attention: at 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 29.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Hamilton Grange National Memorial, General Grant National Memorial and Stonewall National Monument (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Fort Montgomery, NY before heading back.
