Portage, IN to Monrovia, IN is 171.8 miles and takes about 3h 18m via Casimir Pulaski Memorial Highway and Dwight D Eisenhower Highway, with a fuel budget near $27 and enough daylight to finish in a day. This drive stays within the Midwest, moving from one Indiana locale to another. Expect a local, turn-heavy feel for much of this trip, rather than a straightforward highway cruise. It's a manageable one-day journey, ideal for those who prefer a more connected drive through varied terrain over a high-speed interstate dash.
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
85.9 miles from Portage, IN
A natural place for your longest stop of the day
, about 1h 37m into the drive
.
Main Roads
Road
Distance
Duration
Casimir Pulaski Memorial Highway
130 mi
2h 21m
Dwight D Eisenhower Highway
10.5 mi
11m
I 465
9.5 mi
10m
I 65
5.9 mi
6m
I 80
3.7 mi
5m
SR 39
2.6 mi
4m
Indiana Toll Road
2.6 mi
3m
Willowcreek Road
0.6 mi
1m
Longest stretch:
Casimir Pulaski Memorial Highway
— 130 mi, about 2h 21m
Traffic on I-65
Hour-of-day weekday pattern from 48 FHWA count stations on your route.
Peak
4 PM
~1,864 veh/hr typical
· worst 2,433
Quietest
2 AM
~258 veh/hr
Peak-to-quiet ratio
7.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 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 Portage, IN and Monrovia, IN.
1
Start on Central Avenue
0.4 mi·53 sec·Central Avenue
2
Turn right onto Willowcreek Road
0.6 mi·1 min·Willowcreek Road
Use the right lane.
3
Take the ramp
434 ft·11 sec
Toward I 80, I 90
4
Keep slight right at fork
0.1 mi·16 sec
5
Continue on this road
0.4 mi·47 sec·this road
6
Merge onto I 80; I 90
2.6 mi·3 min·Indiana Toll Road
Use the straight / slight right lanes.
7
Take the exit onto I 80
0.6 mi·1 min·I 80
Exit 21Toward I 80 West, I 94, US 6: Des MoinesUse the straight / slight right lanes.
8
Keep slight right at fork onto I 80
0.1 mi·13 sec·I 80
Toward I 94 West, I 80 West, SR 51, US 6 EastUse the straight / slight right lanes.
9
Keep slight left at fork onto I 80
2.9 mi·4 min·I 80
Toward I 94 West, I 80 WestUse the straight / slight right lanes.
10
Take the exit
0.6 mi·51 sec
Exit 12Toward I 65: Gary, Toll Road, IndianapolisUse the slight right lane.
11
Keep slight left at fork
0.1 mi·9 sec
Toward I 65 South, I 80 West, I 94 West, US 6 West: Indianapolis, Chicago
12
Keep slight left at fork
0.5 mi·59 sec
Toward I 65 South: IndianapolisUse the slight left lane.
13
Merge onto I 65
130 mi·2 hr 21 min·Casimir Pulaski Memorial Highway
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 65
5.9 mi·6 min·I 65
Use the straight / slight right lanes.
15
Take the exit
0.2 mi·29 sec
Exit 123Toward I 465 South
16
Continue on this road
0.6 mi·1 min·this road
Exit 123Toward I 465 South
17
Merge onto I 465
9.5 mi·10 min·I 465
18
Take the exit
0.3 mi·32 sec
Exit 9A-BToward I 70: Saint Louis, Indianapolis International Airport, IndianapolisUse the slight right lane.
19
Keep slight right at fork
2.6 mi·5 min
Exit 9BToward I 70 West: Saint Louis, Indianapolis International AirportUse the straight / slight left lanes.
20
Keep slight left at fork
0.3 mi·42 sec
Toward I 70 West: Saint LouisUse the slight left lane.
21
Merge onto I 70
11 mi·11 min·Dwight D Eisenhower Highway
Use the straight / slight right lanes.
22
Take the exit
0.3 mi·26 sec
Exit 59Toward SR 39: Belleville, Monrovia
23
Keep slight left at fork
344 ft·10 sec
Toward Monrovia
24
Turn straight onto SR 39
2.4 mi·4 min·SR 39
25
Turn right onto SR 39; SR 42
0.2 mi·17 sec·SR 39; SR 42
26
Turn right onto North Water Street
32 ft·1 sec·North Water Street
27
Arrive at destination
North Water Street
Trip Plan
Given the 3h 18m duration and the 'turn-heavy local drive' profile, consider leaving in the morning to maximize daylight and allow ample time for navigation. With only one recommended stop and a fuel cost around $27, this is a straightforward one-day trip. The 130-mile stretch on Casimir Pulaski Memorial Highway is your longest continuous segment, so plan your fuel and rest breaks accordingly before or after this part. Keep an eye on your GPS, as the route's character suggests you'll be making frequent turns.
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 85.9 miles from Portage, IN, or about 1h 37m into the drive.
The longest continuous stretch on this route runs about 130 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 38 miles or 45m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 85.9 miles or 1h 37m 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 37m
Traffic, exits, and arrival timing usually matter more near Monrovia, IN than in the middle of the route.
Before You Leave
+
Open the route before leaving Portage, 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 Portage, IN
This is one driving day of about 171.8 miles and 3h 18m.
Your first comfortable stop window is around 38 miles from Portage, 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 Casimir Pulaski Memorial Highway for about 130 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 22
5 decision points cluster between mile 4 and 155.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
4 mi into trip|~6m in|I 80
Take the exit onto I 80 toward I 80 West, I 94, US 6: Des Moines
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 21
Toward I 80 West, I 94, US 6: Des Moines
8
4.6 mi into trip|~7m in|I 80
Keep slight right at fork onto I 80 toward I 94 West, I 80 West, SR 51, US 6 East
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 94 West, I 80 West, SR 51, US 6 East
8
4.7 mi into trip|~7m in|I 80
Keep slight left at fork onto I 80 toward I 94 West, I 80 West
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 94 West, I 80 West
8
7.7 mi into trip|~12m in
Take the exit toward I 65: Gary, Toll Road, Indianapolis
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 12
Toward I 65: Gary, Toll Road, Indianapolis
9
155.4 mi into trip|~2h 55m in
Keep slight right at fork toward I 70 West: Saint Louis, Indianapolis International Airport
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight left lanes.
Exit 9B
Toward I 70 West: Saint Louis, Indianapolis Int...
Fuel & Cost
Regular Gas
$28.56 one way
$57.13 round trip
$4.22/gal25.4 MPG avg60 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.60
$31.11
$62.23
premium
$5.18
$35.06
$70.11
diesel
$5.35
$36.19
$72.37
Estimated Tolls: $0.18
Indiana Toll Road
(2.6 mi)$0.18
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
$29
Tolls
$0
Meals
$25–$50
Total
$54–$79
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 60.1 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $18 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
51.5
0
$18.04
$8.25
Efficient EV
43
0
$15.03
$6.87
EV Truck/SUV
68.7
0
$24.05
$11.00
Gas CO2
60 kg
EV CO2
20 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 May 25, 2026
Origin
Portage, IN
Afternoon
in Portage on Wednesday
Local time
4:53 PM
CDT
Current temp
79°F
Sunny
SSE 5 mph0% chanceLive forecast
Destination
Monrovia, IN
Evening
in Monrovia on Wednesday
Local time
5:53 PM
EDT
Current temp
68°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
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
11 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
3h 18m 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.
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...
6 mi from route
~15 min detour
$20
Park Closure: Partial Closures to Marquette Greenway Trail and Glenwood Dunes Trail
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route offers a turn-heavy local drive experience, with only 13% of the journey on highways. You'll find the longest uninterrupted stretch covers 130 miles on Casimir Pulaski Memorial Highway, providing a substantial period of consistent driving. The profile suggests a route that will require your attention, weaving through local roads and potentially involving more frequent turns and speed adjustments. It’s less about covering ground quickly and more about navigating the landscape as it unfolds.
Only 13% highway — the rest is turn-by-turn surface driving.
27 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 130 mi on Casimir Pulaski Memorial Highway.
How Hard Is This Drive?
10/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 4 miles in near I 80.
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 22 significant decision points across 171.8 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 4 miles (I 80): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.6 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.7 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
949 ft636 ft
Total Climb
532 ft
Total Descent
366 ft
Highest Point
949 ft
~135 mi in
Elevation Range
313 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Portage, IN and Monrovia, IN, road signs point toward Indianapolis International Airport and Indianapolis.
Doable as a same-day drive at 3h 18m. Total distance: 171.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 18m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 130 miles on Casimir Pulaski Memorial Highway. The full list of main roads is in the Roads section above.
Expect about $0.18 in tolls one way, starting with Indiana Toll Road. 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 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 Monrovia, 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 4 miles (I 80): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.6 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.7 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Indiana Dunes National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.3 hours each way, an in-and-out day trip would put you behind the wheel for 6.6 hours — manageable with a long break at Monrovia, IN, but most travelers stay overnight.
