Origin
Flat Rock, MI
Afternoon in Flat Rock on Monday
Local time
12:26 PM
EDT
Current temp
46°F
Unavailable
Live forecast
Trip from Flat Rock, MI to Macomb, MI
Drive Time
6h 37m
Distance
427.6 mi
688 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$65
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
6h 26m
★
6 AM
6h 38m
8 AM
7h 2m
10 AM
6h 46m
12 PM
6h 44m
3 PM
6h 48m
5 PM
7h 1m
8 PM
6h 31m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Flat Rock, MI
TonyNojmanSK
Trip Overview
The drive from Flat Rock, MI to Macomb, MI covers 427.6 miles and takes about 6h 37m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on County 416 20th Road, County 426 M, County 420 21st Road for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $64.95 one way before food or hotel costs.
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
213.8 miles from Flat Rock, MI
A natural place for your longest stop of the day , about 3h 18m into the drive .
Drive Character
Expect a 6h 37m drive with frequent turns across 427.6 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 33 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
County 416 20th Road is one of the defining roads on this drive.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way.
Route Complexity
4/10
Easy - simple navigation with a manageable amount of wheel time
The route itself is not hard, but at 6h 37m, endurance matters. Plan breaks every 2-3 hours. The 0 decision points are all manageable with basic attention.
Where does it get tricky?
This route does not have any notably tricky sections. Most of the drive from Flat Rock, MI to Macomb, MI is straightforward, with well-signed roads and simple exits.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| County 416 20th Road | Unavailable | Refreshing |
| County 426 M | Unavailable | Refreshing |
| County 420 21st Road | Unavailable | Refreshing |
| South Hill Road | Unavailable | Refreshing |
| Blackwell Avenue | Unavailable | Refreshing |
| I 75 South | Unavailable | Refreshing |
| I 75 | Unavailable | Refreshing |
| Shimmons Road | Unavailable | Refreshing |
Per-road distance and duration are being refreshed from OSRM for this route.
Longest stretch:
County 416 20th Road
— detailed segment metrics are refreshing.
Turn-by-Turn Driving Directions
Step-by-step road directions between Flat Rock, MI and Macomb, MI.
1
Start on 20th Road
118 ft
·
5 sec
·
20th Road
2
Continue on County 416 20th Road
3.5 mi
·
4 min
·
County 416 20th Road
3
At the end of the road, turn left onto County 426 M.5 Road
1.0 mi
·
1 min
·
County 426 M.5 Road
4
Turn right onto County 420 21st Road
3.0 mi
·
4 min
·
County 420 21st Road
5
Continue on South Hill Road
0.6 mi
·
1 min
·
South Hill Road
6
Continue on Blackwell Avenue
0.2 mi
·
35 sec
·
Blackwell Avenue
7
Continue on South Hill Road
456 ft
·
22 sec
·
South Hill Road
8
Turn left
133 mi
·
2 hr 37 min
9
Take the exit slight right toward I 75 South: Mackinac Bridge
0.3 mi
·
44 sec
·
I 75 South: Mackinac Bridge
10
Merge slight left
94 mi
·
1 hr 37 min
11
Keep slight left to continue on I 75: Saginaw, Detroit
124 mi
·
2 hr 7 min
·
I 75: Saginaw, Detroit
12
Keep slight left
11 mi
·
11 min
13
Keep slight left
33 mi
·
35 min
14
Take the exit slight right toward I 75 Business, M 24: Pontiac, Lapeer
0.6 mi
·
1 min
·
I 75 Business, M 24: Pontiac, Lapeer
15
Continue straight
0.2 mi
·
27 sec
16
Keep slight right to continue on I 75 Business South: Pontiac
0.6 mi
·
58 sec
·
I 75 Business South: Pontiac
17
Turn left
89 ft
·
4 sec
18
Turn left
154 ft
·
7 sec
19
Exit the roundabout onto Shimmons Road
0.5 mi
·
1 min
·
Shimmons Road
20
At the end of the road, turn left onto Shimmons Road
0.6 mi
·
1 min
·
Shimmons Road
21
At the end of the road, turn left onto North Squirrel Road
0.3 mi
·
38 sec
·
North Squirrel Road
22
Turn right onto Tienken Road
3.5 mi
·
6 min
·
Tienken Road
23
Enter the roundabout and take exit 2 toward West Tienken Road
128 ft
·
3 sec
·
West Tienken Road
24
Exit the roundabout onto West Tienken Road
1.6 mi
·
3 min
·
West Tienken Road
25
Enter the roundabout and take exit 1 toward East Tienken Road
161 ft
·
5 sec
·
East Tienken Road
26
Exit the roundabout onto East Tienken Road
0.6 mi
·
1 min
·
East Tienken Road
27
Enter the roundabout and take exit 2 toward Runyon Road
151 ft
·
3 sec
·
Runyon Road
28
Exit the roundabout onto Runyon Road
0.9 mi
·
1 min
·
Runyon Road
29
Continue on 25 Mile Road
6.0 mi
·
9 min
·
25 Mile Road
30
Enter the roundabout and take exit 2 toward 25 Mile Road
151 ft
·
4 sec
·
25 Mile Road
31
Exit the roundabout onto 25 Mile Road
0.9 mi
·
1 min
·
25 Mile Road
32
Enter the roundabout toward the route
269 ft
·
7 sec
·
the route
33
Arrive at your destination
Trip Plan
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 213.8 miles from Flat Rock, MI, or about 3h 18m into the drive.
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 94 miles or 1h 27m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 213.8 miles or 3h 18m 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 42m
Traffic, exits, and arrival timing usually matter more near Macomb, MI than in the middle of the route.
Before You Leave
+
Open the route before leaving Flat Rock, MI 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 Flat Rock, MI
This is one driving day of about 427.6 miles and 6h 37m.
Your first comfortable stop window is around 94 miles from Flat Rock, MI.
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.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 213.8 mi from Flat Rock, MI · 3h 18m into the drive
Mid-route town
Meal stop
214 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 94 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 213.8 miles from Flat Rock, MI, which is a good place for a longer meal and fuel stop.
Arriving in Macomb, MI
The final approach into Macomb, MI usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Macomb, MI.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$64.95 one way
$129.90 round trip
$3.86/gal
25.4 MPG avg
150 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $71.60 | $143.20 |
| premium | $4.80 | $80.72 | $161.44 |
| diesel | $5.64 | $95.00 | $190.00 |
Estimated Tolls: $4.00
Mackinac Bridge
$4.00
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$65
Tolls
$4
Meals
$25–$50
Total
$94–$119
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 149.6 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $45 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 128.3 | 1 | $44.90 | $20.52 |
| Efficient EV | 106.9 | 1 | $37.42 | $17.10 |
| EV Truck/SUV | 171 | 2 | $59.86 | $27.37 |
Gas CO2
150 kg
EV CO2
50 kg (67% 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.
Destination
Macomb, MI
Afternoon in Macomb on Monday
Local time
12:26 PM
EDT
Current temp
47°F
Unavailable
Live forecast
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
1 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 37m 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.
Frequently Asked Questions
The drive from Flat Rock, MI to Macomb, MI covers 427.6 miles and takes about 6h 37m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are County 416 20th Road, County 426 M, County 420 21st Road. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 213.8 miles from Flat Rock, MI. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $64.95 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
The route itself is not hard, but at 6h 37m, endurance matters. Plan breaks every 2-3 hours. The 0 decision points are all manageable with basic attention.
This route does not have any notably tricky sections. Most of the drive from Flat Rock, MI to Macomb, MI is straightforward, with well-signed roads and simple exits.
The route from Flat Rock, MI to Macomb, MI does not surface many named destination signs beyond the main corridor.
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