Lake Katrine to Islip is 139.9 miles and takes about 3h 1m via New York State Thruway and Southern State Parkway, with a fuel budget near $23 and enough daylight to finish in a day. This trip stays within New York, connecting the Northeast region. The route offers a mixed highway and surface road experience, suitable for a single-day excursion. You'll find it a straightforward drive, especially if you're looking for a direct path across the state.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
70 miles from Lake Katrine, NY
A natural place for your longest stop of the day
, about 1h 23m into the drive
.
Main Roads
Road
Distance
Duration
New York State Thruway
60.6 mi
1h 9m
Southern State Parkway
24.7 mi
31m
NJ 17
14.1 mi
18m
NJ 4
6.7 mi
9m
Cross Bronx Expressway
6.6 mi
8m
Clearview Expressway
5 mi
5m
US 209
3.6 mi
4m
Throgs Neck Bridge
2 mi
3m
Longest stretch:
New York State Thruway
— 60.6 mi, about 1h 9m
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 Lake Katrine, NY and Islip, NY.
1
Start on US 9W
0.6 mi·58 sec·Ulster Avenue
2
Take the ramp
0.3 mi·32 sec
3
Merge onto US 209
3.6 mi·4 min·US 209
4
Take the exit
0.2 mi·27 sec
5
Continue on NY 28
0.6 mi·1 min·State Route 28
6
Enter roundabout
340 ft·4 sec
Toward I 87: New York State Thruway
7
Continue
0.2 mi·26 sec
Toward I 87: New York State Thruway
8
Keep slight left at fork
0.6 mi·1 min
Toward I 87: New York State Thruway
9
Merge onto I 87
61 mi·1 hr 9 min·New York State Thruway
Use the straight / slight right lanes.
10
Keep slight right at fork onto NY 17
0.9 mi·59 sec·NY 17
Exit 15Toward I 287 South, NJ 17 South: New JerseyUse the slight right lane.
11
Continue on I 287; NJ 17
0.5 mi·39 sec·I 287; NJ 17
12
Keep slight left at fork onto NJ 17
14 mi·18 min·NJ 17
Exit 66Toward NJ 17 South: MahwahUse the slight left / straight lanes.
13
Take the exit
0.1 mi·19 sec
Toward NJ 4, GSP South: Paterson, Fort Lee, New York
14
Keep slight left at fork
0.5 mi·1 min
Toward NJ 4 East: Fort Lee, New York
15
Merge onto NJ 4
0.3 mi·24 sec·NJ 4
Use the right lane.
16
Continue on NJ 4
6.4 mi·8 min·NJ 4
Use the straight / slight right lanes.
17
Take the exit
0.2 mi·18 sec
Toward I 95 North: George Washington BridgeUse the straight / slight left lanes.
18
Merge onto I 95 EXPR
0.7 mi·54 sec·I 95 EXPR
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 95 EXPR
0.8 mi·1 min·I 95 EXPR
20
Continue on I 95; US 1; US 9
0.6 mi·1 min·George Washington Bridge (upper level)
Use the straight / slight right lanes.
21
Continue on I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
22
Continue on I 95; US 1
4.7 mi·6 min·Cross Bronx Expressway
Use the straight / slight right lanes.
23
Keep slight right at fork onto I 295
2.0 mi·2 min·Cross Bronx Expressway
Exit 6BToward I 295 South: Throgs Neck BridgeUse the straight / slight left lanes.
24
Merge onto I 295
0.6 mi·58 sec·Throgs Neck Expressway
25
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
Use the straight / slight right lanes.
26
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Use the straight / slight right lanes.
27
Continue on NY 24
0.7 mi·1 min·Hollis Court Boulevard
Use the straight lane.
28
At end of road, turn left onto NY 24
0.2 mi·35 sec·Jamaica Avenue
Use the left lane.
29
Turn right onto Hempstead Avenue
0.9 mi·2 min·Hempstead Avenue
30
Turn right onto 225th Street
228 ft·9 sec·225th Street
Use the right lane.
31
Take the ramp
0.2 mi·28 sec
Toward Cross Island Parkway South, Verrazano Bridge
32
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
Use the straight / slight right lanes.
33
Take the exit
0.5 mi·1 min
Exit 25AToward Southern State Parkway East, Eastern Long IslandUse the slight left / straight lanes.
34
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / slight right lanes.
35
Keep slight left at fork onto SO
0.2 mi·16 sec·Southern State Parkway
Use the straight / slight right lanes.
36
Take the exit
0.2 mi·31 sec
Exit 41SToward Bay Shore Road South, Bay ShoreUse the slight right lane.
37
Turn straight onto CR 57
0.5 mi·1 min·Bay Shore Road
38
Continue on CR 57
0.3 mi·43 sec·Howells Road
39
Turn straight onto CR 57
341 ft·6 sec·Sunrise Highway
40
Keep slight right at fork onto CR 57
0.6 mi·1 min·Howells Road
Toward Howells Road SouthUse the right lane.
41
Continue on CR 57
0.2 mi·24 sec·Roosevelt Street
42
Continue on CR 57
0.7 mi·1 min·3rd Avenue
43
At end of road, turn left onto NY 27A
1.1 mi·1 min·East Main Street
44
Continue on Montauk Highway
0.2 mi·17 sec·Montauk Highway
45
Continue on NY 27A
0.8 mi·1 min·Main Street
46
Arrive at destination
NY 27A
Trip Plan
For this 3-hour drive, leaving in the morning is recommended to avoid peak traffic, especially on the parkways. You'll only need one stop to break up the 139.9 miles, and the estimated fuel cost is around $23. Given the relatively short duration, you have flexibility with your departure time. Keep an eye on your fuel levels, as services can be spaced out on some parkway sections. The New York State Thruway is your primary artery for the first part of the trip, so plan your fuel stops accordingly.
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 70 miles from Lake Katrine, NY, or about 1h 23m into the drive.
The longest continuous stretch on this route runs about 60.6 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 31 miles or 38m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 70 miles or 1h 23m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 26m
Traffic, exits, and arrival timing usually matter more near Islip, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Lake Katrine, 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 Lake Katrine, NY
This is one driving day of about 139.9 miles and 3h 1m.
Your first comfortable stop window is around 31 miles from Lake Katrine, 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 New York State Thruway for about 60.6 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 27
5 decision points cluster between mile 66.7 and 135.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
9
66.7 mi into trip|~1h 19m in|NY 17
Keep slight right at fork onto NY 17 toward I 287 South, NJ 17 South: New Jersey
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 15
Toward I 287 South, NJ 17 South: New Jersey
8
68.1 mi into trip|~1h 20m in|NJ 17
Keep slight left at fork onto NJ 17 toward NJ 17 South: Mahwah
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / straight lanes.
Exit 66
Toward NJ 17 South: Mahwah
8
97.2 mi into trip|~2h 1m in|I 295 / Cross Bronx Expressway
Keep slight right at fork onto I 295 / Cross Bronx Expressway toward I 295 South: Throgs Neck Bridge
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
Exit 6B
Toward I 295 South: Throgs Neck Bridge
8
110.1 mi into trip|~2h 19m in
Take the exit toward Southern State Parkway East, Eastern Long Island
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / straight lanes.
Exit 25A
Toward Southern State Parkway East, Eastern Lon...
9
135.3 mi into trip|~2h 52m in
Take the exit toward Bay Shore Road South, Bay Shore
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 41S
Toward Bay Shore Road South, Bay Shore
Fuel & Cost
Regular Gas
$22.74 one way
$45.47 round trip
$4.13/gal25.4 MPG avg49 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.47
$24.61
$49.22
premium
$4.87
$26.80
$53.60
diesel
$5.40
$29.76
$59.52
Estimated Tolls: $25.58
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
New York State Thruway
(60.6 mi)$3.03
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
$23
Tolls
$26
Meals
$25–$50
Total
$73–$98
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 48.9 kg one way.
Prices: EIA weekly data, 2026-04-20.
Driving Electric?
About $15 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
42
0
$14.69
$6.72
Efficient EV
35
0
$12.24
$5.60
EV Truck/SUV
56
0
$19.59
$8.95
Gas CO2
49 kg
EV CO2
16 kg (67% 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 Apr 25, 2026
Origin
Lake Katrine, NY
Night
in Lake Katrine on Saturday
Local time
9:19 PM
EDT
Current temp
38°F
Partly Cloudy
N 6 mph3% chanceLive forecast
Flood Warning
Flood Warning issued April 24 at 11:36AM EDT by NWS Binghamton NY
Destination
Islip, NY
Night
in Islip on Saturday
Local time
9:19 PM
EDT
Current temp
43°F
Mostly Cloudy
SE 7 mph6% chanceLive forecast
Flood Warning
Flood Warning issued April 24 at 11:36AM EDT by NWS Binghamton NY
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
5 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
3h 1m 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?
This drive features 48% highway driving, so expect stretches of higher speeds. The longest continuous segment on the New York State Thruway spans 60.6 miles. After this, you'll transition to surface roads, indicated by the mixed highway and surface profile. Be prepared for more frequent exits and potentially slower speeds as you move off the main expressways.
48% highway, the rest on surface roads — varied driving throughout.
46 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 60.6 mi on New York State Thruway.
How Hard Is This Drive?
10/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 66.7 miles in near NY 17.
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 27 significant decision points across 139.9 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 66.7 miles (NY 17): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 68.1 miles (NJ 17): Highway fork - watch signs carefully. Lane positioning matters here; at 97.2 miles (I 295 / Cross Bronx Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Lake Katrine, NY and Islip, NY, road signs point toward Gsp South: Paterson, Fort Lee, New York, Cross Island Parkway South, Southern State Parkway East and Eastern Long Island.
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 3h 1m. Total distance: 139.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 1m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 60.6 miles on New York State Thruway. The full list of main roads is in the Roads section above.
Expect about $25.58 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 9 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 Islip, NY before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 9 rest areas along the route for bathroom stops.
The main spots that need attention: at 66.7 miles (NY 17): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 68.1 miles (NJ 17): Highway fork - watch signs carefully. Lane positioning matters here; at 97.2 miles (I 295 / Cross Bronx Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Possible but tiring. At 3.0 hours each way, an in-and-out day trip would put you behind the wheel for 6.1 hours — manageable with a long break at Islip, NY, but most travelers stay overnight.
