Saint Peters, MO to Maryville, MO is 316.6 miles and takes about 5h 58m via I 70 and I 29, with a fuel budget near $56 and enough daylight to finish in a day. This trip stays within Missouri, moving from the Midwest region to another part of the Midwest. It's a straightforward, mostly highway route that can easily be completed in a single day. If you're looking for a direct path with minimal fuss, this drive fits the bill. You'll spend most of your time on major interstates, making for a predictable and efficient transit.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
158.3 miles from Saint Peters, MO
A natural place for your longest stop of the day
, about 2h 58m into the drive
.
Main Roads
Road
Distance
Duration
I 70
204.9 mi
3h 51m
I 29
39.9 mi
43m
US 59
30.3 mi
35m
I 435
20.9 mi
22m
Lamar Hunt Memorial Highway
7.8 mi
9m
Truman/Eisenhower Presidential Highway
5.6 mi
6m
US 71 Business
2.3 mi
4m
Clifton J. Scott Memorial Highway
1.8 mi
2m
Longest stretch:
I 70
— 204.9 mi, about 3h 51m
Traffic on I-70
Hour-of-day weekday pattern from 23 FHWA count stations on your route.
Peak
4 PM
~3,281 veh/hr typical
· worst 3,830
Quietest
1 AM
~292 veh/hr
Peak-to-quiet ratio
11.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters, MO and Maryville, MO.
Exit 8BToward I 435 North, US 24 East: Des MoinesUse the straight / slight right lanes.
7
Merge onto I 435; US 24
7.8 mi·9 min·Lamar Hunt Memorial Highway
8
Continue on I435 N
1.3 mi·1 min·I435 N
9
Continue on I 435
21 mi·22 min·I 435
10
Keep slight left at fork onto I 29; US 71
37 mi·40 min·I 29; US 71
Toward I 29 North, US 71 North: Saint Joseph
11
Continue on I 29; US 59; US 71
2.7 mi·2 min·I 29; US 59; US 71
12
Take the exit onto US 59; US 71
30 mi·35 min·US 59; US 71
Exit 56AToward US 71 North, US 59 North: Maryville
13
Turn left onto US 71 Business
2.3 mi·4 min·US 71 Business
14
Turn right onto MO 46
134 ft·2 sec·East 1st Street
15
Arrive at destination
MO 46
Trip Plan
For this 5h 58m drive, leaving Saint Peters in the morning is ideal to maximize daylight. With only one recommended stop and 95% highway driving, you can comfortably complete this trip in a single day. Keep an eye on your fuel gauge, especially before embarking on the 204.9-mile stretch on I 70, as services can be less frequent in some sections. The $56 fuel cost is an estimate, so it's wise to budget a little extra for fluctuations. Consider a brief stop around the halfway point to stretch your legs and refuel if needed.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 158.3 miles from Saint Peters, MO, or about 2h 58m into the drive.
The longest continuous stretch on this route runs about 204.9 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 70 miles or 1h 19m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 158.3 miles or 2h 58m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 52m
Traffic, exits, and arrival timing usually matter more near Maryville, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Peters, 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 Saint Peters, MO
This is one driving day of about 316.6 miles and 5h 58m.
Your first comfortable stop window is around 70 miles from Saint Peters, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 70 for about 204.9 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 7
5 decision points cluster between mile 0 and 316.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
3
0 mi into trip|~0m in|I 70
Depart onto I 70
Lane positioning matters here
Use the straight / slight right lanes.
8
213.1 mi into trip|~4h in
Take the exit toward I 435 North, US 24 East: Des Moines
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 8B
Toward I 435 North, US 24 East: Des Moines
6
244.2 mi into trip|~4h 36m in|I 29; US 71
Keep slight left at fork onto I 29; US 71 toward I 29 North, US 71 North: Saint Joseph
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 29 North, US 71 North: Saint Joseph
6
284 mi into trip|~5h 19m in|US 59; US 71
Take the exit onto US 59; US 71 toward US 71 North, US 59 North: Maryville
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 56A
Toward US 71 North, US 59 North: Maryville
4
316.5 mi into trip|~5h 58m in|MO 46 / East 1st Street
Turn right onto MO 46 / East 1st Street
Navigation decision point
Fuel & Cost
Regular Gas
$46.75 one way
$93.51 round trip
$3.75/gal25.4 MPG avg111 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$51.62
$103.23
premium
$4.72
$58.78
$117.57
diesel
$4.80
$59.78
$119.56
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$47
Meals
$25–$50
Total
$72–$97
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 110.8 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $33 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
95
1
$33.24
$15.20
Efficient EV
79.2
0
$27.70
$12.66
EV Truck/SUV
126.6
1
$44.32
$20.26
Gas CO2
111 kg
EV CO2
37 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Jul 17, 2026
Origin
Saint Peters, MO
Late night
in Saint Peters on Sunday
Local time
4:35 AM
CDT
Current temp
92°F
Chance Showers And Thunderstorms
W 8 mph29% chanceLive forecast
Heat Advisory
Heat Advisory issued July 17 at 11:01AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO
Heat Advisory
Heat Advisory issued July 17 at 11:01AM CDT until July 21 at 7:00PM CDT by NWS Paducah KY
Destination
Maryville, MO
Late night
in Maryville on Sunday
Local time
4:35 AM
CDT
Current temp
91°F
Sunny
SW 7 to 10 mph14% chanceLive forecast
Heat Advisory
Heat Advisory issued July 17 at 11:01AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO
Heat Advisory
Heat Advisory issued July 17 at 11:01AM CDT until July 21 at 7:00PM CDT by NWS Paducah KY
92°F
Marshall, MO
158 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
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
5h 58m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Gateway Arch National Park
National Park
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...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is primarily on major highways, with 95% of the total distance covered by interstates. You'll experience a long stretch of 204.9 miles on I 70 before transitioning to I 29 and then US 59. Expect consistent cruising with frequent exits on the interstate portions. The final segment on US 59 will likely feel more like typical highway driving as you approach your destination.
95% highway — fuel and pacing are the main things to plan.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 204.9 mi on I 70.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on I 70 and I 29. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near I 70.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 58m drive. You will face about 7 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (I 70): Lane positioning matters here; at 213.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 244.2 miles (I 29; US 71): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
The longest stretch is about 204.9 miles on I 70. The full list of main roads is in the Roads section above.
Yes — we found about 41 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 41 rest areas along the route for bathroom stops.
The main spots that need attention: near the start (I 70): Lane positioning matters here; at 213.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 244.2 miles (I 29; US 71): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.0 hours each way, a round trip means 11.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Maryville, MO before the return drive.
