Origin
Gray Summit, MO
Afternoon in Gray Summit on Sunday
Local time
3:47 PM
CDT
Current temp
55°F
Unavailable
Live forecast
Trip from Gray Summit, MO to Saint Peters, MO
Drive Time
53m
Distance
33.6 mi
54 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$5
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
0h 49m
★
6 AM
0h 53m
8 AM
1h 2m
10 AM
0h 56m
12 PM
0h 55m
3 PM
0h 57m
5 PM
1h 2m
8 PM
0h 51m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Peters, MO
Aleksandra Żmuda
Trip Overview
If you are looking to travel between Gray Summit and Saint Peters, you are looking at a manageable 33.6-mile trek across Missouri. Expect to spend about 53 minutes behind the wheel, making this a perfect candidate for a straightforward day trip. With a fuel budget of just $5, it is an incredibly economical route that requires no overnight stops. Your journey transitions you through the Midwest landscape, moving from the area around Gray Summit toward the Saint Peters corridor. This is a practical, no-nonsense drive that gets you from point A to point B efficiently. Whether you are commuting or heading out for a quick visit, the simplicity of this trip makes it a reliable choice for your schedule.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
16.8 miles from Gray Summit, MO
A natural place for your longest stop of the day , about 24m into the drive .
Drive Character
This trip functions as a highway-focused drive, with 63% of your mileage spent on major roads. You will rely on a combination of MO 100, MO 109, and Mid Rivers Mall Drive to navigate the distance. Expect a varied experience behind the wheel, starting with your longest uninterrupted stretch of 12.8 miles on MO 100. As you transition between these routes, the character of the drive shifts from regional highway transit into the more developed local flow of Mid Rivers Mall Drive. It is a steady, functional path that keeps you moving consistently toward your destination without the need for complex detours.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 21 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
MO 100 is the longest continuous segment at about 12.8 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on MO 100 and MO 109. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 13 miles in near MO 109.
Route Complexity
9/10
High effort - long or complex enough to need steady focus all day
This is a demanding drive. With 14 significant decision points across 33.6 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 13 miles (MO 109): Roundabout - know your exit number before entering; at 13.2 miles (MO 109): Roundabout - know your exit number before entering; at 24.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 14 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
5
13 mi into trip
|
~18m in
|
MO 109
Enter roundabout onto MO 109
Roundabout - know your exit number before entering
5
13.2 mi into trip
|
~18m in
|
MO 109
Enter roundabout onto MO 109
Roundabout - know your exit number before entering
8
24.6 mi into trip
|
~37m in
Take the exit toward MO 94: Defiance, Saint Charles
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 10
Toward MO 94: Defiance, Saint Charles
8
24.8 mi into trip
|
~37m in
Keep slight right at fork toward MO 94 East: Saint Charles
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward MO 94 East: Saint Charles
8
28.3 mi into trip
|
~42m in
Keep slight right at fork toward Mid Rivers Mall Drive, Pitman Hill Road
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward Mid Rivers Mall Drive, Pitman Hill Road
Towns Along This Route
On the drive from Gray Summit, MO to Saint Peters, MO, road signs begin pointing toward Saint Charles along the way.
Saint Charles
24.6 mi in
|
~37m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| MO 100 | 12.8 mi | 17m |
| MO 109 | 4.9 mi | 7m |
| Mid Rivers Mall Drive | 4.7 mi | 9m |
| MO 94 | 3.4 mi | 4m |
| Avenue of the Saints | 2.7 mi | 3m |
| South Eatherton Road | 2.4 mi | 4m |
| Olive Street Road | 0.9 mi | 1m |
| Chesterfield Airport Road | 0.7 mi | 1m |
Longest stretch:
MO 100
— 12.8 mi, about 17m
Turn-by-Turn Driving Directions
Step-by-step road directions between Gray Summit, MO and Saint Peters, MO.
1
Start on MO 100
13 mi
·
17 min
·
MO 100
2
Take the exit
0.2 mi
·
30 sec
Toward MO 109
3
Enter roundabout onto MO 109
224 ft
·
4 sec
·
MO 109
4
Continue on MO 109
515 ft
·
10 sec
·
MO 109
5
Enter roundabout onto MO 109
98 ft
·
1 sec
·
MO 109
6
Continue on MO 109
0.4 mi
·
45 sec
·
MO 109
7
Enter roundabout onto MO 109
94 ft
·
2 sec
·
MO 109
8
Continue on MO 109
4.3 mi
·
6 min
·
MO 109
9
Enter roundabout onto South Eatherton Road
94 ft
·
1 sec
·
South Eatherton Road
10
Continue on South Eatherton Road
2.4 mi
·
4 min
·
South Eatherton Road
11
Continue on Olive Street Road
0.9 mi
·
1 min
·
Olive Street Road
12
Take the ramp onto Chesterfield Airport Road
0.7 mi
·
1 min
·
Chesterfield Airport Road
13
Merge onto I 64; US 40; US 61
2.7 mi
·
3 min
·
Avenue of the Saints
Use the straight lane.
14
Take the exit
0.2 mi
·
15 sec
Exit 10
Toward MO 94: Defiance, Saint Charles
Use the slight right lane.
15
Keep slight right at fork
313 ft
·
4 sec
Toward MO 94 East: Saint Charles
Use the right lane.
16
Merge onto MO 94
3.4 mi
·
4 min
·
MO 94
Use the right lane.
17
Keep slight right at fork
0.2 mi
·
22 sec
Toward Mid Rivers Mall Drive, Pitman Hill Road
Use the straight / slight right lanes.
18
Turn left onto Mid Rivers Mall Drive
4.7 mi
·
9 min
·
Mid Rivers Mall Drive
Use the left / straight lanes.
19
Take the ramp
0.3 mi
·
20 sec
Toward I 70 West: Wentzville
Use the slight left lane.
20
Merge onto I 70
479 ft
·
6 sec
·
I 70
21
Arrive at destination
I 70
Trip Plan
Because this is a short, 53-minute trip, you have plenty of flexibility regarding your departure time. You can easily complete the entire 33.6-mile distance in one go, as there are no required stops factored into the route. Since your fuel cost is estimated at just $5, make sure your tank is topped off before you leave Gray Summit to avoid unnecessary errands once you arrive in Saint Peters. Keep a close eye on your navigation as you transition onto Mid Rivers Mall Drive, as this is where the route shifts from highway speeds to local traffic. Planning for a single, direct drive is the best way to keep your travel time under the one-hour mark.
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 16.8 miles from Gray Summit, MO, or about 24m into the drive.
The longest continuous stretch on this route runs about 12.8 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 33.6 miles or 53m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 16.8 miles or 24m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 43m
Traffic, exits, and arrival timing usually matter more near Saint Peters, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Gray Summit, MO 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 Gray Summit, MO
This is one driving day of about 33.6 miles and 53m.
Your first comfortable stop window is around 80 miles from Gray Summit, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
You may only need one short stretch stop if conditions stay smooth.
The longest stretch is on MO 100 for about 12.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 16.8 mi from Gray Summit, MO · 24m into the drive
Mid-route town
Meal stop
17 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 33.6 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 16.8 miles from Gray Summit, MO, which is a good place for a longer meal and fuel stop.
Arriving in Saint Peters, MO
The final approach into Saint Peters, MO 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 Saint Peters, MO.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$5.10 one way
$10.21 round trip
$3.86/gal
25.4 MPG avg
12 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $5.63 | $11.25 |
| premium | $4.80 | $6.34 | $12.69 |
| diesel | $5.64 | $7.46 | $14.93 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$5
Meals
$25–$50
Total
$30–$55
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 11.8 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $4 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 10.1 | 0 | $3.53 | $1.61 |
| Efficient EV | 8.4 | 0 | $2.94 | $1.34 |
| EV Truck/SUV | 13.4 | 0 | $4.70 | $2.15 |
Gas CO2
12 kg
EV CO2
4 kg (67% 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
Saint Peters, MO
Afternoon in Saint Peters on Sunday
Local time
3:47 PM
CDT
Current temp
54°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 cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
53m 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 Gray Summit, MO to Saint Peters, MO covers 33.6 miles and takes about 53m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are MO 100, MO 109, Mid Rivers Mall Drive. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 16.8 miles from Gray Summit, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $5.10 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 demanding drive. With 14 significant decision points across 33.6 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 13 miles (MO 109): Roundabout - know your exit number before entering; at 13.2 miles (MO 109): Roundabout - know your exit number before entering; at 24.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from Gray Summit, MO to Saint Peters, MO, road signs begin pointing toward Saint Charles along the way.
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