The drive from Spanish Lake, MO to Wentzville, MO covers 37.5 miles and takes about 49m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 70, I 270, Bellefontaine Road for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 22.7 miles on I 70.
At current regular gas prices, budget about $5.86 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 49m. Total distance: 37.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
49m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (91%). Some complex stretches to watch for.
Drive Character
This is a 49m highway drive covering 37.5 miles, with most of the trip on I 70 and I 270. The longest continuous stretch is about 22.7 miles on I 70.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 16 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 70 is the longest continuous segment at about 22.7 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1.4 miles in.
Driving Effort7/10
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 13 decision points packed into just 37.5 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 49m.
Where does it get tricky?
The main spots that need attention: at 1.4 miles: Roundabout - know your exit number before entering; at 1.6 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 13 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 13 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
6
1.4 mi into trip|~2m in
Enter roundabout toward I 270 West: Kansas City
Roundabout - know your exit number before entering
Toward I 270 West: Kansas City
5
1.6 mi into trip|~3m in|I 270
Merge onto I 270
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
13 mi into trip|~17m in
Take the exit toward I 70: Saint Louis, Kansas City
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 20A
Toward I 70: Saint Louis, Kansas City
8
13.7 mi into trip|~18m in
Keep slight right at fork toward I 70 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Exit 20B
Toward I 70 West: Kansas City
6
37.3 mi into trip|~48m in|South Linn Avenue
At end of road, turn left onto South Linn Avenue
Complex interchange - multiple decisions in a short stretch
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 Spanish Lake, MO to Wentzville, MO, road signs begin pointing toward Kansas City along the way.
Kansas City
13 mi in|~17m
Main Roads
Road
Distance
Duration
I 70
22.7 mi
28m
I 270
11.4 mi
14m
Bellefontaine Road
1.2 mi
2m
South Church Street
0.2 mi
<1m
Dunn Road
0.2 mi
<1m
South Linn Avenue
0.1 mi
<1m
West 4th Street
<0.1 mi
<1m
East Allen Street
<0.1 mi
<1m
Longest stretch:
I 70
— 22.7 mi, about 28m
Turn-by-Turn Driving Directions
Step-by-step road directions between Spanish Lake, MO and Wentzville, MO.
1
Start on Bellefontaine Road
1.2 mi·2 min·Bellefontaine Road
Use the left lane.
2
Turn right onto Dunn Road
0.2 mi·29 sec·Dunn Road
3
Enter roundabout
183 ft·10 sec
Toward I 270 West: Kansas City
4
Continue
0.2 mi·11 sec
Toward I 270 West: Kansas City
5
Merge onto I 270
11 mi·14 min·I 270
Use the straight / slight right lanes.
6
Take the exit
0.3 mi·25 sec
Exit 20AToward I 70: Saint Louis, Kansas City
7
Continue on this road
0.5 mi·42 sec·this road
Exit 20A-BToward I 70: Saint Louis, Kansas CityUse the slight left / slight right lanes.
8
Keep slight right at fork
0.5 mi·41 sec
Exit 20BToward I 70 West: Kansas CityUse the slight right lane.
9
Merge onto I 70
23 mi·28 min·I 70
Use the straight / slight right lanes.
10
Take the exit
0.2 mi·23 sec
Exit 209Toward MO Z
11
Enter roundabout onto South Church Street
20 ft·0 sec·South Church Street
12
Continue on South Church Street
0.2 mi·39 sec·South Church Street
13
Turn right onto West 4th Street
442 ft·20 sec·West 4th Street
14
At end of road, turn left onto South Linn Avenue
0.1 mi·26 sec·South Linn Avenue
15
Turn right onto East Allen Street
40 ft·1 sec·East Allen Street
16
Arrive at destination
East Allen Street
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 18.7 mi from Spanish Lake, MO
· 24m into the drive
The midpoint is around 18.7 miles from Spanish Lake, MO, which is a good place for a longer meal and fuel stop.
Arriving in Wentzville, MO
Allow a few extra minutes for the final approach into Wentzville, MO if you are unfamiliar with the area.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$5.86 one way
$11.73 round trip
$3.97/gal25.4 MPG avg13 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$6.44
$12.87
premium
$4.89
$7.22
$14.43
diesel
$5.61
$8.28
$16.56
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$6
Estimated CO2 emission: 13.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $4 in charging
· 0 stops
· 69% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
11.3
0
$3.94
$1.80
Efficient EV
9.4
0
$3.28
$1.50
EV Truck/SUV
15
0
$5.25
$2.40
Gas CO2
13 kg
EV CO2
4 kg (69% 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 17, 2026
Origin
Spanish Lake, MO
Evening
in Spanish Lake on Friday
Local time
7:08 PM
CDT
Current temp
86°F
Slight Chance Showers And Thunderstorms
S 16 mph22% chanceLive forecast
Flood Watch
Flood Watch issued April 17 at 12:46PM CDT until April 18 at 4:00AM CDT by NWS Quad Cities IA IL
Flood Warning
Flood Warning issued April 17 at 12:41PM CDT by NWS St Louis MO
Destination
Wentzville, MO
Evening
in Wentzville on Friday
Local time
7:08 PM
CDT
Current temp
85°F
Chance Showers And Thunderstorms
S 15 mph28% chanceLive forecast
Flood Watch
Flood Watch issued April 17 at 12:46PM CDT until April 18 at 4:00AM CDT by NWS Quad Cities IA IL
Flood Warning
Flood Warning issued April 17 at 12:41PM CDT by NWS St Louis MO
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 cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
49m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Spanish Lake, MO to Wentzville, MO covers 37.5 miles and takes about 49m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, I 270, Bellefontaine Road. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 18.7 miles from Spanish Lake, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $5.86 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 is a short but busy drive. With 13 decision points packed into just 37.5 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 49m.
The main spots that need attention: at 1.4 miles: Roundabout - know your exit number before entering; at 1.6 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 13 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
On the drive from Spanish Lake, MO to Wentzville, MO, road signs begin pointing toward Kansas City 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, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
