Origin
Clarkson Valley, MO
Late night in Clarkson Valley on Saturday
Local time
5:09 AM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from Clarkson Valley, MO to O'Fallon, MO
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards
Drive Time
32m
Distance
20 mi
32 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Good
8 stations
Best Time to Leave
4 AM
0h 30m
★
6 AM
0h 32m
8 AM
0h 38m
10 AM
0h 34m
12 PM
0h 34m
3 PM
0h 35m
5 PM
0h 38m
8 PM
0h 31m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Clarkson Valley, MO
Mark Direen
O'Fallon, MO
Wikimedia Commons
Trip Overview
This straightforward 20-mile drive from Clarkson Valley to O'Fallon, Missouri, is designed for a single day, taking approximately 32 minutes to complete. With no highway driving, expect a local road experience focused on MO K and Clarkson Road, with a segment on Avenue of the Saints. The estimated fuel cost for this short trip is around $3, making it an economical option. This route is ideal for a quick excursion within the Midwest region, offering a simple and direct path between these two Missouri communities. Given its brevity, you won't need an overnight stay, allowing for maximum flexibility in your schedule.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 32m. Total distance: 20 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
32m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
Scenic Drive
Turn-heavy local drive route profile with national parks nearby.
Drive Character
This drive is characterized by its frequent turns, offering a dynamic local road experience rather than a monotonous interstate cruise, as indicated by the 0% highway share. You'll navigate primarily on MO K and Clarkson Road, with a notable stretch of 8.8 miles along Avenue of the Saints. The longest uninterrupted segment is this 8.8-mile portion, after which the road will likely transition through various local thoroughfares. Expect a varied driving feel as you move through different community and rural settings within Missouri.
This route has more turning and local-road decision points than a simple highway run.
There are about 16 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Avenue of the Saints is the longest continuous segment at about 8.8 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.3 miles in near Forest Club Drive.
Driving Effort
6/10
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 20 miles you will encounter 8 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 0.3 miles (Forest Club Drive): Complex interchange - multiple decisions in a short stretch; at 0.4 miles (MO 340 / Clarkson Road): Navigation decision point; at 3.6 miles: Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 8 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
0.3 mi into trip
|
~1m in
|
Forest Club Drive
At end of road, turn right onto Forest Club Drive
Complex interchange - multiple decisions in a short stretch
5
0.4 mi into trip
|
~1m in
|
MO 340 / Clarkson Road
At end of road, turn left onto MO 340 / Clarkson Road
Navigation decision point
6
3.6 mi into trip
|
~7m in
Take the ramp toward I 64 West, US 40 West, US 61 North
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight left lanes.
Toward I 64 West, US 40 West, US 61 North
5
3.7 mi into trip
|
~7m in
|
I 64; US 40; US 61 / Avenue of the Saints
Merge onto I 64; US 40; US 61 / Avenue of the Saints
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
7
12.5 mi into trip
|
~18m in
Take the exit toward MO K: O'Fallon
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 9
Toward MO K: O'Fallon
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 Clarkson Valley, MO to O'Fallon, MO, road signs begin pointing toward Mo K: O'fallon along the way.
Mo K: O'fallon
12.5 mi in
|
~18m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Avenue of the Saints | 8.8 mi | 10m |
| MO K | 6.3 mi | 11m |
| Clarkson Road | 2.7 mi | 4m |
| South Main Street | 0.6 mi | 1m |
| North Outer Road | 0.5 mi | <1m |
| North Outer 40 | 0.4 mi | <1m |
| Greenbank Drive | 0.3 mi | 1m |
| Olive Boulevard | <0.1 mi | <1m |
Longest stretch:
Avenue of the Saints
— 8.8 mi, about 10m
Turn-by-Turn Driving Directions
Step-by-step road directions between Clarkson Valley, MO and O'Fallon, MO.
1
Start on Greenbank Drive
0.3 mi
·
1 min
·
Greenbank Drive
2
At end of road, turn right onto Forest Club Drive
344 ft
·
21 sec
·
Forest Club Drive
3
At end of road, turn left onto MO 340
2.7 mi
·
4 min
·
Clarkson Road
4
Continue on MO 340
483 ft
·
16 sec
·
Olive Boulevard
5
Turn left onto North Outer 40
0.4 mi
·
58 sec
·
North Outer 40
6
Take the ramp
457 ft
·
11 sec
Toward I 64 West, US 40 West, US 61 North
Use the straight / slight left lanes.
7
Merge onto I 64; US 40; US 61
8.8 mi
·
10 min
·
Avenue of the Saints
Use the straight lane.
8
Take the exit
327 ft
·
6 sec
Exit 9
Toward MO K: O'Fallon
Use the straight / slight right lanes.
9
Merge onto North Outer Road
0.3 mi
·
31 sec
·
North Outer Road
10
Continue on North Outer Road
0.2 mi
·
17 sec
·
North Outer Road
11
Turn right onto MO K
3.3 mi
·
5 min
·
MO K
12
Continue on MO K
1.5 mi
·
2 min
·
MO K
Use the right lane.
13
Continue on MO K
1.6 mi
·
3 min
·
MO K
Use the right lane.
14
Continue on South Main Street
0.6 mi
·
1 min
·
South Main Street
15
Turn right
25 ft
·
1 sec
16
Arrive at destination
Fuel & Cost
Regular Gas
$2.97 one way
$5.94 round trip
$3.77/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $3.35 | $6.70 |
| premium | $4.65 | $3.66 | $7.33 |
| diesel | $5.30 | $4.18 | $8.35 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7 kg one way.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 6 | 0 | $2.10 | $0.96 |
| Efficient EV | 5 | 0 | $1.75 | $0.80 |
| EV Truck/SUV | 8 | 0 | $2.80 | $1.28 |
Gas CO2
7 kg
EV CO2
2 kg (71% 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.
Destination
O'Fallon, MO
Late night in O'Fallon on Saturday
Local time
5:09 AM
CDT
Current temp
57°F
Unavailable
Live forecast
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
32m 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 Clarkson Valley, MO to O'Fallon, MO covers 20 miles and takes about 32m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Avenue of the Saints, MO K, Clarkson Road. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 10 miles from Clarkson Valley, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $2.97 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 20 miles you will encounter 8 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 0.3 miles (Forest Club Drive): Complex interchange - multiple decisions in a short stretch; at 0.4 miles (MO 340 / Clarkson Road): Navigation decision point; at 3.6 miles: Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from Clarkson Valley, MO to O'Fallon, MO, road signs begin pointing toward Mo K: O'fallon along the way.
Yes. Nearby national parks include Gateway Arch National Park.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and NPS for national parks. See our methodology for refresh cadence and limitations.
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