Rochester Hills to Saint Louis is 113.3 miles and takes about 2 hours 14 minutes via I 75 and Gratiot Road, with a fuel budget near $18 and enough daylight to finish in a day. This trip stays within Michigan, connecting two points in the Midwest. It's a straightforward drive that primarily uses major roads, making it a convenient option for a single-day excursion. Expect a highway-focused experience for most of the journey, with minimal complexity in navigation.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
56.6 miles from Rochester Hills, MI
A natural place for your longest stop of the day
, about 1h 4m into the drive
.
Main Roads
Road
Distance
Duration
I 75
70.6 mi
1h 15m
Gratiot Road
16.7 mi
19m
East Monroe Road
10.4 mi
14m
M 59
2.6 mi
2m
Sheridan Avenue
1.9 mi
2m
East Saginaw Street
1.6 mi
2m
East Holland Avenue
1.3 mi
1m
Gratiot Avenue
1.3 mi
1m
Longest stretch:
I 75
— 70.6 mi, about 1h 15m
Turn-by-Turn Driving Directions
Step-by-step road directions between Rochester Hills, MI and Saint Louis, MI.
1
Start on Dickson Lane
0.2 mi·53 sec·Dickson Lane
2
At end of road, turn right onto Downhill Lane
378 ft·18 sec·Downhill Lane
3
Turn right onto Dressler Lane
196 ft·14 sec·Dressler Lane
4
Turn left onto South Livernois Road
0.3 mi·27 sec·South Livernois Road
5
Enter roundabout onto West Hamlin Road
17 ft·0 sec·West Hamlin Road
6
Continue on West Hamlin Road
1.0 mi·2 min·West Hamlin Road
7
Turn left onto Crooks Road
0.4 mi·37 sec·Crooks Road
8
Take the ramp
0.5 mi·1 min
Toward M 59 West: PontiacUse the right lane.
9
Merge onto M 59
2.6 mi·2 min·M 59
10
Take the exit
0.6 mi·1 min
Exit 40BToward I 75 North: FlintUse the slight right lane.
11
Merge onto I 75
33 mi·35 min·I 75
12
Keep slight left at fork onto I 75
38 mi·40 min·I 75
Toward I 75: Saginaw
13
Take the exit
0.2 mi·44 sec
Exit 149Toward M 46: Buena Vista, Sandusky
14
Enter roundabout onto M 46
13 ft·0 sec·East Holland Avenue
15
Continue on M 46
0.2 mi·15 sec·East Holland Avenue
16
Enter roundabout onto M 46
106 ft·5 sec·East Holland Avenue
17
Continue on M 46
1.1 mi·1 min·East Holland Avenue
Use the straight / left lanes.
18
Turn slight right onto M 46
1.1 mi·1 min·East Remington Street
19
Turn left onto M 46
1.9 mi·2 min·Sheridan Avenue
20
Continue on M 46
0.4 mi·34 sec·Williams Street
Use the straight / right lanes.
21
Turn left onto Gratiot Avenue
1.3 mi·1 min·Gratiot Avenue
Use the left lane.
22
Continue on M 46
11 mi·13 min·Gratiot Road
23
Continue on M 46
0.6 mi·40 sec·East Saginaw Street
24
Continue on M 46
0.1 mi·9 sec·North Saginaw Street
25
Continue on M 46
4.1 mi·4 min·Gratiot Road
26
Continue on M 46
0.5 mi·1 min·Saginaw Street
27
Continue on M 46
0.7 mi·1 min·West Saginaw Street
28
Continue on M 46
1.2 mi·1 min·Gratiot Road
29
Continue on M 46
5.0 mi·7 min·East Monroe Road
30
Continue on M 46
1.0 mi·2 min·East Saginaw Street
31
Continue on M 46
5.4 mi·7 min·East Monroe Road
32
Continue on M 46
0.6 mi·1 min·East Washington Street
33
Turn right onto North Main Street
173 ft·5 sec·North Main Street
34
Arrive at destination
North Main Street
Trip Plan
Given the 2 hour 14 minute duration, this is a perfect same-day trip, allowing for a flexible departure time. Consider leaving in the morning to maximize daylight, especially if you prefer to avoid driving in the dark. With only 113.3 miles, you won't need extensive stops, but there are opportunities to pull over on I 75 if needed. Keep an eye on your fuel gauge, as the estimated cost is $18; it's wise to fill up before heading out or at a major exit on I 75 to ensure you have plenty for the 70.6-mile stretch. Be aware that Gratiot Road can have more local traffic, so adjust your speed accordingly.
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 Rochester Hills, MI, or about 1h 4m into the drive.
The longest continuous stretch on this route runs about 70.6 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 30m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 56.6 miles or 1h 4m 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 45m
Traffic, exits, and arrival timing usually matter more near Saint Louis, MI than in the middle of the route.
Before You Leave
+
Open the route before leaving Rochester Hills, 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 Rochester Hills, MI
This is one driving day of about 113.3 miles and 2h 14m.
Your first comfortable stop window is around 25 miles from Rochester Hills, MI.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 75 for about 70.6 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 16
5 decision points cluster between mile 0.2 and 76.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.2 mi into trip|~0m in|Downhill Lane
At end of road, turn right onto Downhill Lane
Navigation decision point
5
0.3 mi into trip|~1m in|South Livernois Road
Turn left onto South Livernois Road
Navigation decision point
6
2 mi into trip|~4m in
Take the ramp toward M 59 West: Pontiac
Lane positioning matters here
Use the right lane.
Toward M 59 West: Pontiac
7
5.2 mi into trip|~8m in
Take the exit toward I 75 North: Flint
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 40B
Toward I 75 North: Flint
6
76.3 mi into trip|~1h 25m in
Take the exit toward M 46: Buena Vista, Sandusky
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 149
Toward M 46: Buena Vista, Sandusky
Fuel & Cost
Regular Gas
$17.71 one way
$35.43 round trip
$3.97/gal25.4 MPG avg40 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$19.45
$38.90
premium
$4.89
$21.80
$43.61
diesel
$5.61
$25.02
$50.03
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$18
Meals
$25–$50
Total
$43–$68
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, 2026-04-13.
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 Apr 15, 2026
Origin
Rochester Hills, MI
Late night
in Rochester Hills on Sunday
Local time
12:42 AM
EDT
Current temp
47°F
Unavailable
Live forecast
Destination
Saint Louis, MI
Late night
in Saint Louis on Sunday
Local time
12:42 AM
EDT
Current temp
45°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
2 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
2h 14m 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.
More Details
What kind of drive is this?
This route is predominantly a highway-focused drive, with 62% of the journey on major roadways like I 75. You'll experience the longest uninterrupted stretch of 70.6 miles on I 75, offering a consistent pace. While the majority of the drive is on the interstate, the route also incorporates sections of Gratiot Road and East Monroe Road, which may offer a slight change in scenery and traffic patterns. Overall, anticipate a driving experience characterized by efficient travel on well-maintained roads.
62% highway — fuel and pacing are the main things to plan.
34 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 70.6 mi on I 75.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 75 and Gratiot Road. You will hit about 16 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.2 miles in near Downhill Lane.
Driving Effort6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 113.3 miles you will encounter 16 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (Downhill Lane): Navigation decision point; at 0.3 miles (South Livernois Road): Navigation decision point; at 2 miles: Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Rochester Hills, MI and Saint Louis, MI, road signs point toward M 46: Buena Vista and Sandusky.
M 46: Buena Vista
76.3 mi in|~1h 25m
Sandusky
76.3 mi in|~1h 25m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 14m. Total distance: 113.3 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h 14m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (62%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 70.6 miles on I 75. The full list of main roads is in the Roads section above.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Saint Louis, MI before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 0.2 miles (Downhill Lane): Navigation decision point; at 0.3 miles (South Livernois Road): Navigation decision point; at 2 miles: Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Saint Louis, MI before heading back.
