Saint Joseph, IN to Thorntown, IN is 142 miles and takes about 2h 49m via I 65 and US 52, with a fuel budget near $22 and enough daylight to finish in a day. This Midwest road trip stays within Indiana, offering a straightforward journey for a single day of travel. You'll primarily be on major highways, making for an efficient transit between these two points. Consider this route if you're looking for a quick and uncomplicated drive with minimal fuss.
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
71 miles from Saint Joseph, IN
A natural place for your longest stop of the day
, about 1h 25m into the drive
.
Main Roads
Road
Distance
Duration
I 65
125.6 mi
2h 21m
US 52
5.6 mi
8m
US 31
2.9 mi
4m
Perry Crossing Road
2.7 mi
6m
IN-47
2.1 mi
3m
State Road 111
1.8 mi
3m
Memphis-Blue Lick Road
0.6 mi
1m
West Main Street
0.4 mi
<1m
Longest stretch:
I 65
— 125.6 mi, about 2h 21m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Joseph, IN and Thorntown, IN.
1
Start on Grant Line Road
233 ft·4 sec·Grant Line Road
2
Continue on State Road 111
1.8 mi·3 min·State Road 111
3
Turn right onto SR 60
0.2 mi·24 sec·State Road 60
4
Turn left onto Perry Crossing Road
2.7 mi·6 min·Perry Crossing Road
5
Turn left onto US 31
2.9 mi·4 min·US 31
6
Turn left onto Memphis-Blue Lick Road
0.6 mi·1 min·Memphis-Blue Lick Road
7
Take the ramp
0.3 mi·33 sec
8
Merge onto I 65
96 mi·1 hr 45 min·I 65
Use the straight / slight right lanes.
9
Keep slight right at fork onto I 65
30 mi·35 min·I 65
Use the slight right lane.
10
Take the exit onto US 52
0.2 mi·15 sec·US 52
Exit 141Toward US 52 West
11
Keep slight right at fork onto US 52
5.4 mi·7 min·US 52
Exit 141Toward US 52 West
12
Turn left onto SR 47
2.1 mi·3 min·IN-47
13
Continue on SR 47
0.4 mi·37 sec·West Main Street
14
Arrive at destination
SR 47
Trip Plan
Given the relatively short duration of under 3 hours, this trip is easily manageable in a single day. Leaving in the morning will give you ample time to reach Thorntown, IN, with daylight to spare. You'll encounter one designated stop point, but with a longest stretch of 125.6 miles on I 65, plan your fuel and rest breaks accordingly, perhaps closer to the beginning or end of that long highway segment. The fuel cost is estimated at $22, so keep that in mind as you budget for your journey.
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.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 71 miles from Saint Joseph, IN, or about 1h 25m into the drive.
The longest continuous stretch on this route runs about 125.6 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 40m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 71 miles or 1h 25m 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 16m
Traffic, exits, and arrival timing usually matter more near Thorntown, IN than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Joseph, 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 Joseph, IN
This is one driving day of about 142 miles and 2h 49m.
Your first comfortable stop window is around 31 miles from Saint Joseph, 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 125.6 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 10
5 decision points cluster between mile 1.8 and 134.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
1.8 mi into trip|~3m in|SR 60 / State Road 60
Turn right onto SR 60 / State Road 60
Navigation decision point
5
8.4 mi into trip|~15m in|I 65
Merge onto I 65
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
104.2 mi into trip|~2h 1m 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.
5
134 mi into trip|~2h 37m in|US 52
Take the exit onto US 52 toward US 52 West
Exit ramp - move to the correct lane early
Exit 141
Toward US 52 West
6
134.3 mi into trip|~2h 37m in|US 52
Keep slight right at fork onto US 52 toward US 52 West
Highway fork - watch signs carefully
Exit 141
Toward US 52 West
Fuel & Cost
Regular Gas
$22.20 one way
$44.40 round trip
$3.97/gal25.4 MPG avg50 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$24.37
$48.75
premium
$4.89
$27.33
$54.65
diesel
$5.61
$31.35
$62.70
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$22
Meals
$25–$50
Total
$47–$72
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 49.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $15 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
42.6
0
$14.91
$6.82
Efficient EV
35.5
0
$12.42
$5.68
EV Truck/SUV
56.8
0
$19.88
$9.09
Gas CO2
50 kg
EV CO2
17 kg (66% 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 16, 2026
Origin
Saint Joseph, IN
Morning
in Saint Joseph on Sunday
Local time
10:34 AM
EDT
Current temp
78°F
Chance Showers And Thunderstorms
W 9 to 13 mph9% chanceLive forecast
Flood Warning
Flood Warning issued April 16 at 3:01PM EDT by NWS Northern Indiana
Flood Watch
Flood Watch issued April 16 at 12:24PM CDT by NWS Chicago IL
Destination
Thorntown, IN
Morning
in Thorntown on Sunday
Local time
10:34 AM
EDT
Current temp
53°F
Unavailable
Live forecast
71°F
Greenwood, IN
71 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
25 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
2h 49m 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 is predominantly highway-focused, with 96% of the 142 miles on major roads like I 65 and US 52. You'll experience a significant stretch of 125.6 miles on I 65 without needing to exit, which means consistent speeds and minimal traffic interruptions. Expect a very direct and efficient travel experience, as the route prioritizes speed and ease of navigation over winding local roads.
96% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 125.6 mi on I 65.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 65 and US 52. There are only a few real navigation decisions along the way. The trickiest moment comes around 1.8 miles in near SR 60 / State Road 60.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 2h 49m drive. You will face about 10 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 1.8 miles (SR 60 / State Road 60): Navigation decision point; at 8.4 miles (I 65): Merge point - match speed before joining. Lane positioning matters here; at 104.2 miles (I 65): Highway fork - watch signs carefully. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 49m. Total distance: 142 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
The longest stretch is about 125.6 miles on I 65. The full list of main roads is in the Roads section above.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 1.8 miles (SR 60 / State Road 60): Navigation decision point; at 8.4 miles (I 65): Merge point - match speed before joining. Lane positioning matters here; at 104.2 miles (I 65): Highway fork - watch signs carefully. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Thorntown, IN before heading back.
