Rockford to Mazon is 113.3 miles and takes about 2 hours 7 minutes via I-39 and I-80, with a fuel budget near $18 and enough daylight to finish in a day. This trip stays within Illinois, making it a straightforward drive through the Midwest. Given its relatively short duration and mostly highway profile, it's an easy option for a day trip or a quick leg of a longer journey. You'll be on major interstates for most of the way, so expect efficient travel.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
56.6 miles from Rockford, IL
A natural place for your longest stop of the day
, about 1h 5m into the drive
.
Main Roads
Road
Distance
Duration
I 39
59.8 mi
1h 4m
I 80
33.2 mi
35m
Division Street
10 mi
11m
U.S. Grant Memorial Highway
4.3 mi
4m
South Main Street
3.6 mi
6m
South Church Street
0.3 mi
<1m
West State Street
0.1 mi
<1m
East Street
<0.1 mi
<1m
Longest stretch:
I 39
— 59.8 mi, about 1h 4m
Traffic on I-39
Hour-of-day weekday pattern from 2 FHWA count stations on your route.
Peak
2 PM
~1,252 veh/hr typical
· worst 1,626
Quietest
midnight
~126 veh/hr
Peak-to-quiet ratio
9.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 50 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 Mazon, 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
60 mi·1 hr 4 min·I 39; US 51
9
Take the exit
0.5 mi·58 sec
Exit 59AToward I 80 East: Chicago
10
Merge onto I 80
33 mi·35 min·I 80
Use the straight / slight right lanes.
11
Take the exit
0.3 mi·33 sec
Toward IL 47: Yorkville, MorrisUse the straight / slight right lanes.
12
Turn right onto IL 47
10 mi·11 min·Division Street
13
Continue on IL 47
429 ft·7 sec·East Street
14
Continue on North Street
141 ft·6 sec·North Street
15
Turn right
83 ft·6 sec
16
Arrive at destination
Trip Plan
Since this drive is under 3 hours, it's best tackled in one go, allowing for flexibility in your departure time. Leaving in the morning or early afternoon should give you ample daylight to complete the trip comfortably. Plan for one brief stop to stretch your legs, perhaps around the halfway point, though no specific stops are designated on this route. Keep an eye on your fuel gauge, especially before departing Rockford, as the $18 fuel estimate suggests a direct trip with minimal detours. The 59.8-mile stretch on I-39 means you'll have a solid period of highway driving before nearing Mazon.
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.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 56.6 miles from Rockford, IL, or about 1h 5m into the drive.
The longest continuous stretch on this route runs about 59.8 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 25 miles or 31m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 56.6 miles or 1h 5m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 44m
Traffic, exits, and arrival timing usually matter more near Mazon, 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 113.3 miles and 2h 7m.
Your first comfortable stop window is around 25 miles from Rockford, IL.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 39 for about 59.8 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 0.1 and 113.2 — 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
5
69.2 mi into trip|~1h 18m in
Take the exit toward I 80 East: Chicago
Exit ramp - move to the correct lane early
Exit 59A
Toward I 80 East: Chicago
5
69.7 mi into trip|~1h 19m in|I 80
Merge onto I 80
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
102.9 mi into trip|~1h 55m in
Take the exit toward IL 47: Yorkville, Morris
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.
Toward IL 47: Yorkville, Morris
5
113.2 mi into trip|~2h 7m in
Turn right
Navigation decision point
Fuel & Cost
Regular Gas
$16.73 one way
$33.46 round trip
$3.75/gal25.4 MPG avg40 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$18.47
$36.94
premium
$4.72
$21.04
$42.07
diesel
$4.80
$21.39
$42.79
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$17
Meals
$25–$50
Total
$42–$67
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 39.6 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $12 in charging
· 0 stops
· 68% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
34
0
$11.90
$5.44
Efficient EV
28.3
0
$9.91
$4.53
EV Truck/SUV
45.3
0
$15.86
$7.25
Gas CO2
40 kg
EV CO2
13 kg (68% 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 Jul 19, 2026
Origin
Rockford, IL
Morning
in Rockford on Sunday
Local time
6:30 AM
CDT
Current temp
64°F
Areas Of Smoke
ENE 5 to 10 mph0% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued July 18 at 9:16PM CDT until July 19 at 10:00AM CDT by NWS Chicago IL
Flood Warning
Flood Warning issued July 18 at 8:38PM CDT until July 19 at 7:00AM CDT by NWS Lincoln IL
Destination
Mazon, IL
Morning
in Mazon on Sunday
Local time
6:30 AM
CDT
Current temp
66°F
Areas Of Smoke
NE 5 mph0% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued July 18 at 9:16PM CDT until July 19 at 10:00AM CDT by NWS Chicago IL
Flood Warning
Flood Warning issued July 18 at 8:38PM CDT until July 19 at 7:00AM CDT by NWS Lincoln IL
84°F
Mendota, IL
57 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
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
2h 7m 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 route is predominantly highway driving, with 82% of the 113.3 miles on interstates. The longest continuous stretch you'll experience is 59.8 miles on I-39. You'll transition from interstate cruising to surface roads, specifically Division Street, as you approach your destination. Expect a pattern of high-speed travel broken by exit ramps and local traffic as you near Mazon.
82% highway — fuel and pacing are the main things to plan.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 59.8 mi on I 39.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 39 and I 80. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near IL 2 / South Church Street.
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 7m 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 0.1 miles (IL 2 / South Church Street): Navigation decision point; at 69.2 miles: Exit ramp - move to the correct lane early; at 69.7 miles (I 80): Merge point - match speed before joining. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
919 ft517 ft
Total Climb
431 ft
Total Descent
562 ft
Highest Point
919 ft
~48.5 mi in
Elevation Range
402 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Rockford, IL to Mazon, IL, road signs begin pointing toward Morris along the way.
Morris
102.9 mi in|~1h 55m
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
The longest stretch is about 59.8 miles on I 39. The full list of main roads is in the Roads section above.
Yes — we found about 16 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.
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 0.1 miles (IL 2 / South Church Street): Navigation decision point; at 69.2 miles: Exit ramp - move to the correct lane early; at 69.7 miles (I 80): Merge point - match speed before joining. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Mazon, IL before heading back.
