The drive from O'Fallon, MO to Sainte Genevieve County, MO covers 89.9 miles and takes about 1h 52m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Police Officer Steven Jarvis Memorial Highway, I 270, I 70 for much of the mileage,
and the overall profile is mixed drive.
The longest uninterrupted segment is about 42.6 miles on Police Officer Steven Jarvis Memorial Highway.
At current regular gas prices, budget about $14.05 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
45 miles from O'Fallon, MO
A natural place for your longest stop of the day
, about 56m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 52m. Total distance: 89.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 52m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (45%). Some complex stretches to watch for.
Scenic Drive
Mixed drive route profile with national parks nearby.
Drive Character
The drive from O'Fallon, MO to Sainte Genevieve County, MO covers 89.9 miles and takes about 1h 52m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 20 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Police Officer Steven Jarvis Memorial Highway is the longest continuous segment at about 42.6 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in near Drennen Parkway.
Driving Effort9/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 89.9 miles you will encounter 15 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 0.6 miles (Drennen Parkway): Lane positioning matters here; at 15.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 15.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 15 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
5
0.6 mi into trip|~1m in|Drennen Parkway
Turn left onto Drennen Parkway
Lane positioning matters here
Use the left lane.
8
15.1 mi into trip|~20m in
Take the exit toward I 270: Chicago, Memphis
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 232
Toward I 270: Chicago, Memphis
7
15.2 mi into trip|~20m in
Keep slight right at fork toward I 270 South: Memphis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 270 South: Memphis
8
34.8 mi into trip|~44m in
Take the exit toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
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.
Exit 1A
Toward I 55, US 61, US 67: Saint Louis, Memphis...
6
81.6 mi into trip|~1h 35m in
Take the exit toward MO 32, MO A, MO B: Sainte Genevieve, Farmington
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 150
Toward MO 32, MO A, MO B: Sainte Genevieve, Far...
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between O'Fallon, MO and Sainte Genevieve County, MO, road signs point toward Memphis, Mo A, Mo B: Sainte Genevieve and Farmington.
Memphis
15.1 mi in|~20m
Mo A
81.6 mi in|~1h 35m
Mo B: Sainte Genevieve
81.6 mi in|~1h 35m
Farmington
81.6 mi in|~1h 35m
Main Roads
Road
Distance
Duration
Police Officer Steven Jarvis Memorial Highway
42.6 mi
45m
I 270
19 mi
23m
I 70
13.5 mi
16m
MO 32
6.7 mi
10m
Officer Thomas G. Smith, Jr. Memorial Highway
1.8 mi
2m
Rosa Parks Highway
1.5 mi
1m
River Aux Vases Church Road
0.9 mi
3m
Drennen Parkway
0.9 mi
1m
Longest stretch:
Police Officer Steven Jarvis Memorial Highway
— 42.6 mi, about 45m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Sainte Genevieve County, MO.
1
Start on this road
25 ft·7 sec·this road
2
Turn left onto South Main Street
0.6 mi·1 min·South Main Street
3
Turn left onto Drennen Parkway
0.9 mi·1 min·Drennen Parkway
Use the left lane.
4
Take the ramp
438 ft·6 sec
Toward I 70 East: Saint LouisUse the slight left lane.
5
Merge onto I 70
14 mi·16 min·I 70
Use the straight / slight right lanes.
6
Take the exit
0.2 mi·12 sec
Exit 232Toward I 270: Chicago, MemphisUse the slight right lane.
7
Keep slight right at fork
0.4 mi·33 sec
Toward I 270 South: MemphisUse the slight right lane.
8
Continue on this road
0.1 mi·10 sec·this road
Exit 232Toward I 270 South: Memphis
9
Merge onto I 270
19 mi·23 min·I 270
Use the straight lane.
10
Take the exit
0.4 mi·27 sec
Exit 1AToward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry RoadUse the straight / slight right lanes.
11
Keep slight right at fork
0.4 mi·43 sec
Toward I 55 South: Memphis
12
Merge onto I 55
1.5 mi·1 min·Rosa Parks Highway
13
Continue on I 55
1.8 mi·2 min·Officer Thomas G. Smith, Jr. Memorial Highway
14
Continue on I 55
43 mi·45 min·Police Officer Steven Jarvis Memorial Highway
Use the straight / slight right lanes.
15
Take the exit
0.2 mi·16 sec
Exit 150Toward MO 32, MO A, MO B: Sainte Genevieve, Farmington
16
Turn sharp right onto MO 32
6.7 mi·10 min·MO 32
17
Turn left onto River Aux Vases Church Road
0.2 mi·51 sec·River Aux Vases Church Road
18
Turn left onto River Aux Vases Church Road
0.7 mi·2 min·River Aux Vases Church Road
19
Turn left
0.6 mi·2 min
20
Arrive at destination
Trip Plan
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 45 miles from O'Fallon, MO, or about 56m into the drive.
The longest continuous stretch on this route runs about 42.6 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 20 miles or 26m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 45 miles or 56m 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 30m
Traffic, exits, and arrival timing usually matter more near Sainte Genevieve County, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving O'Fallon, MO so your first major turns are already loaded.
Day 1
Settle into the route from O'Fallon, MO
This is one driving day of about 89.9 miles and 1h 52m.
Your first comfortable stop window is around 20 miles from O'Fallon, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on Police Officer Steven Jarvis Memorial Highway for about 42.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 45 mi from O'Fallon, MO
· 56m into the drive
The midpoint is around 45 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Arriving in Sainte Genevieve County, MO
The final approach into Sainte Genevieve County, MO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Ste. Geneviève National Historical Park
National Historical Park
Established by 1750, Ste. Geneviève was the first permanent European settlement in Missouri. Early French Canadian settlers were drawn here by the rich agricultural land known as Le Grand Champ (the B...
6 mi from route
~14 min detour
Free
near mile 80.6
Gateway Arch National Park commemorates President Jefferson’s vision of a continental nation, the individuals and cultural groups who helped shape its history, St. Louis’ role in westward expansion, a...
12 mi from route
~31 min detour
$19
near mile 34.1
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$14.05 one way
$28.11 round trip
$3.97/gal25.4 MPG avg32 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$15.43
$30.86
premium
$4.89
$17.30
$34.60
diesel
$5.61
$19.85
$39.70
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$14
Meals
$25–$50
Total
$39–$64
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 31.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging
· 0 stops
· 65% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
27
0
$9.44
$4.32
Efficient EV
22.5
0
$7.87
$3.60
EV Truck/SUV
36
0
$12.59
$5.75
Gas CO2
31 kg
EV CO2
11 kg (65% 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
O'Fallon, MO
Evening
in O'Fallon on Thursday
Local time
5:25 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Destination
Sainte Genevieve County, MO
Evening
in Sainte Genevieve County on Thursday
Local time
5:25 PM
CDT
Current temp
45°F
Unavailable
Live forecast
57°F
Imperial, MO
45 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
12 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
1h 52m 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.
Frequently Asked Questions
The drive from O'Fallon, MO to Sainte Genevieve County, MO covers 89.9 miles and takes about 1h 52m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Police Officer Steven Jarvis Memorial Highway, I 270, I 70. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 45 miles from O'Fallon, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $14.05 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This drive requires moderate attention. Across 89.9 miles you will encounter 15 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 0.6 miles (Drennen Parkway): Lane positioning matters here; at 15.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 15.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Between O'Fallon, MO and Sainte Genevieve County, MO, road signs point toward Memphis, Mo A, Mo B: Sainte Genevieve and Farmington.
Yes. Nearby national parks include Ste. Geneviève National Historical Park and Gateway Arch National Park.
