If you are planning a trip from Markham to Decatur, you are looking at a straightforward 85.9-mile journey across the Illinois Midwest. With a drive time of approximately 1 hour and 39 minutes, this route is perfectly suited for a single-day excursion, meaning you can easily head out and return without needing an overnight stay. You should budget about $13 for fuel to cover the distance, making it a very economical trip. Since the drive is entirely within Illinois, you will experience a consistent regional feel throughout the transition. Overall, this is a practical, efficient route that prioritizes speed and convenience over scenic detours.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
43 miles from Markham, IL
A natural place for your longest stop of the day
, about 50m into the drive
.
Main Roads
Road
Distance
Duration
I 72
71.9 mi
1h 18m
US Highway 67
6.4 mi
6m
US 36
5.8 mi
8m
Markham Road
1.1 mi
4m
North Main Street
0.4 mi
<1m
East Wood Street
<0.1 mi
<1m
Longest stretch:
I 72
— 71.9 mi, about 1h 18m
Turn-by-Turn Driving Directions
Step-by-step road directions between Markham, IL and Decatur, IL.
1
Start on Markham Road
1.1 mi·4 min·Markham Road
2
Turn right onto US 67; IL 104
6.4 mi·6 min·US Highway 67
3
Take the exit
0.3 mi·44 sec
Toward I 72 East: Quincy
4
Merge onto I 72; US 36
42 mi·45 min·I 72; US 36
5
Take the exit onto I 72; US 36
30 mi·32 min·I 72; US 36
Toward I 72 East, US 36 East: Decatur
6
Take the exit onto US 36
0.3 mi·40 sec·US 36
Exit 133Toward US 36 East, US 51 South: Decatur, Pana
7
Keep slight left at fork onto US 36
5.5 mi·8 min·US 36
Toward US 36 East: DecaturUse the left lane.
8
Turn right onto US 51 Business
0.4 mi·48 sec·North Main Street
9
Turn left onto East Wood Street
298 ft·8 sec·East Wood Street
10
Arrive at destination
East Wood Street
Trip Plan
Since the total drive time is under two hours, you have significant flexibility to depart whenever fits your schedule best. You won't need to stress over complex stop-planning, as the direct nature of the route allows you to complete the trip in one go without mandatory breaks. However, keeping an eye on your fuel gauge before merging onto the long 71.9-mile stretch of I-72 is a smart move to ensure you don't have to cut your momentum short. Because you are spending nearly the entire trip on highways, try to plan your departure to avoid peak traffic hours on the interstate to keep your travel time closer to that 1 hour and 39 minute estimate.
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 43 miles from Markham, IL, or about 50m into the drive.
The longest continuous stretch on this route runs about 71.9 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 19 miles or 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 43 miles or 50m 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 22m
Traffic, exits, and arrival timing usually matter more near Decatur, IL than in the middle of the route.
Before You Leave
+
Open the route before leaving Markham, IL so your first major turns are already loaded.
Day 1
Settle into the route from Markham, IL
This is one driving day of about 85.9 miles and 1h 39m.
Your first comfortable stop window is around 19 miles from Markham, IL.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 72 for about 71.9 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 8
5 decision points cluster between mile 7.5 and 85.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
7.5 mi into trip|~11m in
Take the exit toward I 72 East: Quincy
Exit ramp - move to the correct lane early
Toward I 72 East: Quincy
5
49.7 mi into trip|~57m in|I 72; US 36
Take the exit onto I 72; US 36 toward I 72 East, US 36 East: Decatur
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 72 East, US 36 East: Decatur
6
79.7 mi into trip|~1h 30m in|US 36
Take the exit onto US 36 toward US 36 East, US 51 South: Decatur, Pana
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 133
Toward US 36 East, US 51 South: Decatur, Pana
7
80 mi into trip|~1h 30m in|US 36
Keep slight left at fork onto US 36 toward US 36 East: Decatur
Highway fork - watch signs carefully. Lane positioning matters here
Use the left lane.
Toward US 36 East: Decatur
4
85.5 mi into trip|~1h 38m in|US 51 Business / North Main Street
Turn right onto US 51 Business / North Main Street
Navigation decision point
Fuel & Cost
Regular Gas
$13.43 one way
$26.86 round trip
$3.97/gal25.4 MPG avg30 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$14.75
$29.49
premium
$4.89
$16.53
$33.06
diesel
$5.61
$18.97
$37.93
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$13
Meals
$25–$50
Total
$38–$63
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 30.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
25.8
0
$9.02
$4.12
Efficient EV
21.5
0
$7.52
$3.44
EV Truck/SUV
34.4
0
$12.03
$5.50
Gas CO2
30 kg
EV CO2
10 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 Apr 19, 2026
Origin
Markham, IL
Late night
in Markham on Tuesday
Local time
4:26 AM
CDT
Current temp
44°F
Unavailable
Live forecast
Destination
Decatur, IL
Late night
in Decatur on Tuesday
Local time
4:26 AM
CDT
Current temp
68°F
Unavailable
Live forecast
75°F
Grandview, IL
43 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
24 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
1h 39m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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.
Springfield 1908 Race Riot National Monument
National Monument
In August 1908, a large White mob attacked the Black community in Springfield, Illinois. Rioters destroyed homes and businesses and lynched two men. The event led to the founding of the National Assoc...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a highly efficient, highway-focused experience, as 98% of your time will be spent on major routes like I-72, US-67, and US-36. The vast majority of your journey consists of a 71.9-mile stretch on I-72, which provides a consistent, high-speed pace for the bulk of your travel. Because this is a highway-heavy drive, you will find the road conditions to be relatively uniform throughout the journey. You will not encounter many technical segments, making it a predictable and straightforward drive for anyone comfortable with interstate travel. It is the type of route where you can settle into a steady rhythm without much variation in road style.
98% highway — fuel and pacing are the main things to plan.
10 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 71.9 mi on I 72.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 72 and US Highway 67. There are only a few real navigation decisions along the way. The trickiest moment comes around 7.5 miles in.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 1h 39m drive. You will face about 8 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 7.5 miles: Exit ramp - move to the correct lane early; at 49.7 miles (I 72; US 36): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 79.7 miles (US 36): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
690 ft588 ft
Total Climb
196 ft
Total Descent
106 ft
Highest Point
690 ft
~79.8 mi in
Elevation Range
102 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 Markham, IL to Decatur, IL, road signs begin pointing toward Pana along the way.
The longest stretch is about 71.9 miles on I 72. The full list of main roads is in the Roads section above.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 7.5 miles: Exit ramp - move to the correct lane early; at 49.7 miles (I 72; US 36): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 79.7 miles (US 36): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Yes — Springfield 1908 Race Riot National Monument. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Decatur, IL before heading back.
