How far is Rockford, IL from Big Rock, IL?
The driving distance from Rockford, IL to Big Rock, IL is about 65.2 miles (105 km), with a travel time of about 01h 25m by car.
- The straight-line flight distance is about 44.9 miles (72.3 km).
- For a round trip, plan for roughly 02h 51m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 25m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Human settlement in Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Rockford and Big Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Rockford and Big Rock.
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1
Start on West State Street
546 ft · 23 sec · West State Street
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2
Turn left onto South Church Street
1519 ft · 37 sec · South Church Street
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3
Turn left onto Cedar Street
84 m · 5 sec · Cedar Street
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4
Turn right onto South Main Street
3.6 mi · 6 min · South Main Street
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5
Take the ramp left
1707 ft · 44 sec
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6
Merge slight left onto U.S. Grant Memorial Highway
4.3 mi · 5 min · U.S. Grant Memorial Highway
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7
Take the exit slight right
1.2 km · 2 min
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8
Merge slight right
31.1 mi · 33 min
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9
Take the exit slight right toward US 30: Sterling, Rock Falls, Aurora
2117 ft · 54 sec
-
10
Turn straight
24.3 mi · 37 min
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11
Turn right
14 m · 4 sec
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12
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Rockford and Big Rock.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
U.S. Grant Memorial Highway
Merge slight right
31.1 mi · 00h 33m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving Rockford and Sunny near Big Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Rockford to Big Rock?
The road trip is about 65.2 miles (105 km) and usually takes 01h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Steward is a useful midpoint, sitting about 32.6 miles from Rockford and 32.6 miles from Big Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 44.9 miles (72.3 km), while the road route adds roughly 20.3 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 3:38 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.67 one way or $17.35 round trip. Estimated CO2 is about 20.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Rockford and Sunny near Big Rock.
Stop Ideas Near Steward
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Steward.
Mendota station
Plano
Rockford, Illinois
Princeton
Flight Path Map
This map shows the direct air route between Rockford and Big Rock. Straight-line distance: 44.91 mi (72.27 km).
#1 Rockford
The second most populous city in Illinois.
| Population | 144,835 |
| Coordinates | 42.2711300, -89.0940000 |
| Altitude | 218 |
| Country | United States |
#2 Big Rock
Village in Kane County, Illinois, United States
| Population | 1,121 |
| Coordinates | 41.7639200, -88.5470200 |
| Altitude | 216 |
| Country | United States |
End: Big Rock (-88.54702, 41.76392)
Estimated Travel Time
Distance: 105 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 10m |
| 40 mph (64.37 km/h) | 01h 37m |
| 50 mph (80.47 km/h) | 01h 18m |
| 60 mph (96.56 km/h) | 01h 05m |
| 70 mph (112.65 km/h) | 00h 55m |
| 80 mph (129 km/h) | 00h 48m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $8.67 | $17.35 |
| Mid-grade | $4.25 | $9.78 | $19.56 |
| Premium | $4.65 | $10.70 | $21.41 |
| Diesel | $5.30 | $12.20 | $24.40 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Illinois · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.