How far is Green Rock, IL from Markham, IL?
The driving distance from Green Rock, IL to Markham, IL is about 149.6 miles (240.8 km), with a travel time of about 02h 23m by car.
- The straight-line flight distance is about 137.9 miles (222 km).
- For a round trip, plan for roughly 04h 46m 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 02h 23m.
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.
Village also known as Utica, in LaSalle County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Green Rock and Markham.
Turn-by-Turn Driving Directions
Step-by-step road directions between Green Rock and Markham.
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1
Start on Green Park Avenue
27 m · 9 sec · Green Park Avenue
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2
Turn left onto 7th Avenue
16 m · 8 sec · 7th Avenue
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3
Turn left
1.2 mi · 2 min
-
4
Turn left
1.6 km · 1 min
-
5
Take the ramp right
1275 ft · 31 sec
-
6
Merge slight left onto Chicago-Kansas City Expressway
1.5 km · 60 sec · Chicago-Kansas City Expressway
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7
Keep slight right to continue on I 80 East: Chicago
144.5 mi · 2 hr 40 min
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8
Take the exit slight right toward Kedzie Avenue
1232 ft · 33 sec
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9
Turn left onto Kedzie Avenue
1.3 km · 2 min · Kedzie Avenue
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10
Turn left onto 163rd Street
20 m · 3 sec · 163rd Street
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11
Arrive at your destination
0 m · 1 sec · 163rd Street
Car Route Details
A richer read on the saved driving route between Green Rock and Markham.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 80 East
Keep slight right to continue on I 80 East: Chicago
145 mi · 02h 40m
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.
Sunny leaving Green Rock and Mostly Sunny near Markham.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Green Rock to Markham?
The road trip is about 149.6 miles (240.8 km) and usually takes 02h 23m 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?
Utica is a useful midpoint, sitting about 74.3 miles from Green Rock and 75.2 miles from Markham.
How much longer is the road route than the straight-line distance?
The direct path is about 137.9 miles (222 km), while the road route adds roughly 11.7 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 1:44 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.91 one way or $39.82 round trip. Estimated CO2 is about 46.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Green Rock and Mostly Sunny near Markham.
Stop Ideas Near Utica
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 Utica.
Mendota station
Princeton
Plano
Dwight station
Flight Path Map
This map shows the direct air route between Green Rock and Markham. Straight-line distance: 137.98 mi (222.05 km).
#1 Green Rock
City in Illinois, United States of America
| Population | 2,970 |
| Coordinates | 41.4730900, -90.3576300 |
| Altitude | 182 |
| Country | United States |
#2 Markham
A city located in Cook County, Illinois.
| Population | 13,400 |
| Coordinates | 41.5936500, -87.6947700 |
| Altitude | 189 |
| Country | United States |
End: 163rd Street (-87.694771, 41.593508)
Estimated Travel Time
Distance: 241 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 59m |
| 40 mph (64.37 km/h) | 03h 44m |
| 50 mph (80.47 km/h) | 02h 59m |
| 60 mph (96.56 km/h) | 02h 29m |
| 70 mph (112.65 km/h) | 02h 08m |
| 80 mph (129 km/h) | 01h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $19.91 | $39.82 |
| Mid-grade | $4.25 | $22.46 | $44.91 |
| Premium | $4.65 | $24.57 | $49.15 |
| Diesel | $5.30 | $28.01 | $56.01 |
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.