Saint Marys, IN to City of Gary, IN is 269.3 miles and takes about 5h 13m via I 65, with a fuel budget near $43 and enough daylight to finish in a day. This drive stays within the Midwest, entirely within Indiana, making it a straightforward trip without crossing state lines. Given its relatively short duration and highway-focused profile, this route is best suited for a single-day excursion. You'll spend the vast majority of your time on major interstates, so expect a predictable and efficient travel experience. Consider this an easy option if you need to get from point A to point B without much fuss.
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
134.6 miles from Saint Marys, IN
A natural place for your longest stop of the day
, about 2h 41m into the drive
.
Main Roads
Road
Distance
Duration
I 65
255.6 mi
4h 44m
I 265
5.2 mi
5m
Paoli Pike
1.4 mi
3m
Saint Marys Road
1.2 mi
4m
East 5th Avenue
1 mi
1m
East 4th Avenue
0.9 mi
1m
Madison Street
0.5 mi
1m
Hilltop Road
0.3 mi
1m
Longest stretch:
I 65
— 255.6 mi, about 4h 44m
Traffic on I-65
Hour-of-day weekday pattern from 242 FHWA count stations on your route.
Peak
4 PM
~2,987 veh/hr typical
· worst 3,683
Quietest
2 AM
~354 veh/hr
Peak-to-quiet ratio
8.4×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 104 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 Saint Marys, IN and City of Gary, IN.
1
Start on Saint Marys Road
1.2 mi·4 min·Saint Marys Road
2
Keep slight left at fork onto Jones Lane
0.3 mi·1 min·Jones Lane
3
Turn left onto Spickert Knob Road
0.2 mi·40 sec·Spickert Knob Road
4
Turn right
0.3 mi·2 min
5
Turn right onto North Hill Drive
0.2 mi·35 sec·North Hill Drive
6
Turn slight right onto Hilltop Road
0.3 mi·1 min·Hilltop Road
7
At end of road, turn left onto Paoli Pike
1.4 mi·3 min·Paoli Pike
8
Continue on State Street
0.1 mi·27 sec·State Street
9
Take the ramp
0.4 mi·50 sec
10
Merge onto I 265; SR 62
5.2 mi·5 min·I 265; SR 62
11
Take the exit
0.3 mi·33 sec
Exit 7Toward I 65 North, I 65 South: Indianapolis, Louisville
12
Keep slight left at fork
0.7 mi·1 min
Toward I 65 North: Indianapolis
13
Merge onto I 65
106 mi·1 hr 56 min·I 65
Use the straight / slight right lanes.
14
Keep slight right at fork onto I 65
30 mi·35 min·I 65
Use the slight right lane.
15
Take the exit onto US 52
0.2 mi·15 sec·US 52
Exit 141Toward US 52 West
16
Keep slight left at fork
0.1 mi·9 sec
17
Merge onto I 65
120 mi·2 hr 11 min·I 65
Use the straight / slight right lanes.
18
Turn left onto US 12; US 20
1.0 mi·1 min·East 5th Avenue
19
Continue on US 12; US 20
0.9 mi·1 min·East 4th Avenue
20
Turn left onto Madison Street
0.5 mi·1 min·Madison Street
21
Turn right onto West 8th Avenue
0.2 mi·31 sec·West 8th Avenue
22
Turn left
342 ft·25 sec
23
Arrive at destination
Trip Plan
For this 5-hour drive, departing in the morning is ideal to maximize daylight and avoid rush hour traffic if possible. Since it's a single-day trip, you have flexibility in when you stop, but breaking it up with one planned stop around the halfway point can make the drive more comfortable. Keep an eye on your fuel gauge, especially during the 255.6-mile stretch on I 65, as services can be less frequent in some sections. The $43 fuel cost is an estimate, so confirm current prices before you leave. The limited highway share means you won't be navigating complex surface street systems for long.
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 134.6 miles from Saint Marys, IN, or about 2h 41m into the drive.
The longest continuous stretch on this route runs about 255.6 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 59 miles or 1h 16m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 134.6 miles or 2h 41m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 17m
Traffic, exits, and arrival timing usually matter more near City of Gary, IN than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Marys, IN 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 Saint Marys, IN
This is one driving day of about 269.3 miles and 5h 13m.
Your first comfortable stop window is around 59 miles from Saint Marys, IN.
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 I 65 for about 255.6 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 17
5 decision points cluster between mile 2.5 and 116.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
2.5 mi into trip|~10m in|Paoli Pike
At end of road, turn left onto Paoli Pike
Navigation decision point
6
9.6 mi into trip|~21m in
Take the exit toward I 65 North, I 65 South: Indianapolis, Louisville
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 7
Toward I 65 North, I 65 South: Indianapolis, Lo...
5
9.9 mi into trip|~21m in
Keep slight left at fork toward I 65 North: Indianapolis
Highway fork - watch signs carefully
Toward I 65 North: Indianapolis
5
10.6 mi into trip|~23m in|I 65
Merge onto I 65
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
116.4 mi into trip|~2h 19m in|I 65
Keep slight right at fork onto I 65
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Fuel & Cost
Regular Gas
$36.58 one way
$73.16 round trip
$3.45/gal25.4 MPG avg94 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$3.85
$40.82
$81.64
premium
$4.15
$44.00
$88.00
diesel
$3.75
$39.76
$79.52
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$37
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 94.2 kg one way.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
80.8
0
$28.28
$12.93
Efficient EV
67.3
0
$23.56
$10.77
EV Truck/SUV
107.7
1
$37.70
$17.24
Gas CO2
94 kg
EV CO2
32 kg (66% 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 Oct 17, 2026
Origin
Saint Marys, IN
Morning
in Saint Marys on Sunday
Local time
7:36 AM
EDT
Current temp
55°F
Sunny
N 6 to 10 mph0% chanceLive forecast
Freeze Warning
Freeze Warning issued October 17 at 6:52AM EDT until October 18 at 9:00AM EDT by NWS Indianapolis IN
Freeze Warning
Freeze Warning issued October 17 at 1:34AM EDT until October 18 at 9:00AM EDT by NWS Northern Indiana
Destination
City of Gary, IN
Morning
in City of Gary on Sunday
Local time
6:36 AM
CDT
Current temp
57°F
Slight Chance Rain Showers then Mostly Sunny
S 5 to 10 mph17% chanceLive forecast
Freeze Warning
Freeze Warning issued October 17 at 6:52AM EDT until October 18 at 9:00AM EDT by NWS Indianapolis IN
Freeze Warning
Freeze Warning issued October 17 at 1:34AM EDT until October 18 at 9:00AM EDT by NWS Northern Indiana
72°F
Beech Grove, IN
135 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
1 hour earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
2 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
5h 13m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Indiana Dunes National Park
National Park
Lake Michigan's might has influenced Indiana Dunes for millennia. Wind and waves have shaped the land, leaving a rich mosaic of habitats along these 15 miles of Indiana coast. Over 50 miles of trails...
13 mi from route
~33 min detour
$20
near mile 269.3
Caution: Road Blocked to West Beach
Park Closure: Partial Trail Closure - Dunewood Trace
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is predominantly highway driving, with 97% of the route on major interstates. You'll encounter a long stretch of 255.6 miles on I 65, meaning extended periods of cruising. The transition to surface roads will be minimal, likely occurring only as you approach your final destination in Gary. Be prepared for consistent interstate travel with frequent exits for services and potential traffic merging as you get closer to urban areas.
97% highway — fuel and pacing are the main things to plan.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 255.6 mi on I 65.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on I 65 and I 265. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 2.5 miles in near Paoli Pike.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 269.3 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 2.5 miles (Paoli Pike): Navigation decision point; at 9.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 9.9 miles: Highway fork - watch signs carefully.
Elevation Profile
Mostly flat terrain
929 ft522 ft
Total Climb
548 ft
Total Descent
766 ft
Highest Point
929 ft
~134.6 mi in
Elevation Range
407 ft
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 13m. Total distance: 269.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 13m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (97%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 255.6 miles on I 65. The full list of main roads is in the Roads section above.
Yes — we found about 34 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 City of Gary, IN 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 34 rest areas along the route for bathroom stops.
The main spots that need attention: at 2.5 miles (Paoli Pike): Navigation decision point; at 9.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 9.9 miles: Highway fork - watch signs carefully.
Yes — Indiana Dunes National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.2 hours each way, a round trip means 10.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at City of Gary, IN before the return drive.
