Traveling from Rockford to Cambria covers 347.1 miles across the heart of Illinois. You should plan for a total drive time of approximately 6 hours and 47 minutes, making this a long but manageable single-day trip if you are comfortable with a full day behind the wheel. Expect to budget about $53 for fuel to complete the journey. The route primarily utilizes I-39, the Ken Gray Expressway, and I-57 to traverse the state. Since both the origin and destination are located within the Midwest, you will experience a consistent regional landscape throughout the drive. It is a straightforward, highway-focused trip that prioritizes efficiency over local backroads.
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
173.5 miles from Rockford, IL
A natural place for your longest stop of the day
, about 3h 17m into the drive
.
Main Roads
Road
Distance
Duration
I 39
118.2 mi
2h 6m
Ken Gray Expressway
32.7 mi
35m
I 57
24.5 mi
26m
North Walnut Street
23.2 mi
29m
South Business Route 51
19.6 mi
23m
300 East Road
15.1 mi
17m
North 1450 East Road
14.7 mi
17m
United States Highway 51
13.4 mi
15m
Longest stretch:
I 39
— 118.2 mi, about 2h 6m
Traffic on I-57
Hour-of-day weekday pattern from 8 FHWA count stations on your route.
Peak
4 PM
~1,380 veh/hr typical
· worst 1,728
Quietest
2 AM
~240 veh/hr
Peak-to-quiet ratio
5.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 47 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 Rockford, IL and Cambria, IL.
1
Start on West State Street
0.1 mi·23 sec·West State Street
2
Turn left onto IL 2
0.3 mi·36 sec·South Church Street
3
Turn left onto IL 2
275 ft·4 sec·Cedar Street
4
Turn right onto IL 2
3.6 mi·6 min·South Main Street
5
Take the ramp
0.3 mi·43 sec
6
Merge onto US 20
4.3 mi·4 min·U.S. Grant Memorial Highway
7
Take the exit
0.8 mi·1 min
8
Merge onto I 39; US 51
118 mi·2 hr 6 min·I 39; US 51
9
Keep slight right at fork onto US 51
7.6 mi·8 min·US 51
Toward I 55 South, US 51 South: Peoria, Champaign, Saint Louis, Decatur
10
Keep slight left at fork onto I 74; US 51
2.1 mi·2 min·I 74; US 51
Toward I 74 East, US 51 South, US 55 Business North: Indianapolis, Decatur
11
Take the exit onto US 51
0.3 mi·39 sec·US 51
Exit 135Toward US 51 South, US 51 Business North: Decatur, Bloomington
12
Continue on US 51
15 mi·17 min·North 1450 East Road
Use the straight lane.
13
Continue on US 51
23 mi·29 min·North Walnut Street
14
Turn straight onto US 51 Business
9.9 mi·15 min·US 51 Business
15
Take the ramp onto US 51 Business
20 mi·23 min·South Business Route 51
16
Continue on US 51
7.9 mi·9 min·North 2600 East Rd
17
Turn right onto US 51; IL 16
1.0 mi·1 min·North 2600 East Road
18
Continue on US 51; IL 16
0.5 mi·1 min·Jackson Street
19
Turn left onto US 51; IL 16
467 ft·8 sec·Cedar Street
20
Turn right onto US 51; IL 16
0.4 mi·1 min·East 1st Street
21
Turn left onto US 51; IL 16
0.4 mi·29 sec·South Poplar Street
22
Turn straight onto US 51
0.6 mi·2 min·Fair Avenue
23
Continue on US 51
2.0 mi·2 min·County Road 2400 E
24
Continue on US 51
15 mi·17 min·300 East Road
25
Continue on US 51
11 mi·12 min·County Road 875 East
26
Continue on US 51
1.5 mi·1 min·North Kennedy Boulevard
27
Turn left onto US 40; US 51; IL 185
0.5 mi·34 sec·West Gallatin Street
28
Turn right
0.1 mi·7 sec
29
Continue on US 51
13 mi·15 min·United States Highway 51
30
Continue on US 51
10 mi·11 min·250E
31
Turn left onto US 50
7.6 mi·8 min·US 50
32
Take the exit
0.3 mi·45 sec
33
Merge onto I 57
24 mi·26 min·I 57
34
Keep slight right at fork onto I 57
33 mi·35 min·Ken Gray Expressway
35
Take the exit
0.3 mi·38 sec
Toward Johnston City, Herrin
36
Turn right onto Herrin Road
3.1 mi·4 min·Herrin Road
37
Continue on East Herrin Street
3.1 mi·5 min·East Herrin Street
38
Continue on Herrin Road
3.5 mi·5 min·Herrin Road
39
Enter roundabout onto Cambria Road
221 ft·4 sec·Cambria Road
40
Continue on Cambria Road
0.5 mi·48 sec·Cambria Road
41
Continue on North Maple Street
1.5 mi·2 min·North Maple Street
42
Arrive at destination
South Maple Street
Trip Plan
To keep your energy high during this 347.1-mile trek, plan for at least one dedicated stop to stretch your legs and refuel. Since the drive takes nearly 7 hours, departing early in the morning is your best strategy to avoid fatigue and ensure you reach Cambria before dark. Keep a close eye on your fuel levels, especially when navigating the transition between the major interstates, as the $53 estimate can fluctuate based on your vehicle's efficiency. Given the length of the longest stretch on I-39, ensure your vehicle is prepped for sustained high-speed travel before you leave Rockford. Taking that single planned break midway will make the time on I-57 feel much more manageable.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 173.5 miles from Rockford, IL, or about 3h 17m into the drive.
The longest continuous stretch on this route runs about 118.2 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 76 miles or 1h 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 173.5 miles or 3h 17m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 36m
Traffic, exits, and arrival timing usually matter more near Cambria, IL than in the middle of the route.
Before You Leave
+
Open the route before leaving Rockford, IL 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 Rockford, IL
This is one driving day of about 347.1 miles and 6h 47m.
Your first comfortable stop window is around 76 miles from Rockford, IL.
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 39 for about 118.2 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 21
5 decision points cluster between mile 0.1 and 335 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.1 mi into trip|~0m in|IL 2 / South Church Street
Turn left onto IL 2 / South Church Street
Navigation decision point
6
127.6 mi into trip|~2h 21m in|US 51
Keep slight right at fork onto US 51 toward I 55 South, US 51 South: Peoria, Champaign, Saint Louis, Decatur
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 55 South, US 51 South: Peoria, Champai...
6
135.2 mi into trip|~2h 29m in|I 74; US 51
Keep slight left at fork onto I 74; US 51 toward I 74 East, US 51 South, US 55 Business North: Indianapolis, Decatur
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 74 East, US 51 South, US 55 Business N...
6
137.3 mi into trip|~2h 31m in|US 51
Take the exit onto US 51 toward US 51 South, US 51 Business North: Decatur, Bloomington
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 135
Toward US 51 South, US 51 Business North: Decat...
5
335 mi into trip|~6h 28m in
Take the exit toward Johnston City, Herrin
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward Johnston City, Herrin
Fuel & Cost
Regular Gas
$57.71 one way
$115.42 round trip
$4.22/gal25.4 MPG avg121 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.60
$62.86
$125.72
premium
$5.18
$70.83
$141.66
diesel
$5.35
$73.11
$146.22
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$58
Meals
$25–$50
Total
$83–$108
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 121.4 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $36 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
104.1
1
$36.45
$16.66
Efficient EV
86.8
0
$30.37
$13.88
EV Truck/SUV
138.8
1
$48.59
$22.21
Gas CO2
121 kg
EV CO2
41 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Jun 1, 2026
Origin
Rockford, IL
Afternoon
in Rockford on Wednesday
Local time
2:03 PM
CDT
Current temp
59°F
Chance Light Rain
ENE 5 mph50% chanceLive forecast
Flood Warning
Flood Warning issued May 31 at 10:38AM CDT until June 3 at 1:00PM CDT by NWS Paducah KY
Destination
Cambria, IL
Afternoon
in Cambria on Wednesday
Local time
2:03 PM
CDT
Current temp
65°F
Chance Showers And Thunderstorms
SSE 1 mph51% chanceLive forecast
Flood Warning
Flood Warning issued May 31 at 10:38AM CDT until June 3 at 1:00PM CDT by NWS Paducah KY
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
6 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
6h 47m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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 journey is defined by its reliance on major interstates, with 68% of the trip consisting of highway driving. You will settle into a steady rhythm quickly, highlighted by the longest uninterrupted stretch of 118.2 miles on I-39. Because this is a highway-focused drive, the experience is largely about consistent speed and navigating major arterial roads rather than technical turns. As you transition between the Ken Gray Expressway and I-57, the character of the road remains utilitarian and predictable. Expect a disciplined, fast-paced drive that rewards focus and steady cruising across the Illinois plains.
68% highway — fuel and pacing are the main things to plan.
42 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 118.2 mi on I 39.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on I 39 and Ken Gray Expressway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.1 miles in near IL 2 / South Church Street.
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 21 significant decision points across 347.1 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 0.1 miles (IL 2 / South Church Street): Navigation decision point; at 127.6 miles (US 51): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 135.2 miles (I 74; US 51): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
928 ft426 ft
Total Climb
444 ft
Total Descent
735 ft
Highest Point
928 ft
~49.6 mi in
Elevation Range
502 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Rockford, IL and Cambria, IL, road signs point toward Champaign, Saint Louis, Decatur and Bloomington.
Champaign
127.6 mi in|~2h 21m|via US 51
Saint Louis
127.6 mi in|~2h 21m|via US 51
Decatur
127.6 mi in|~2h 21m|via US 51
Bloomington
137.3 mi in|~2h 31m|via US 51
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
Doable as a same-day drive at 6h 47m. Total distance: 347.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 47m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 118.2 miles on I 39. The full list of main roads is in the Roads section above.
Yes — we found about 31 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 Cambria, IL 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 31 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.1 miles (IL 2 / South Church Street): Navigation decision point; at 127.6 miles (US 51): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 135.2 miles (I 74; US 51): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Not recommended in a single day. At 6.8 hours each way, a round trip means 13.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Cambria, IL before the return drive.
