Saint Peters, MO to Palmyra, MO is 97.7 miles and takes about 2 hours via Avenue of the Saints, with a fuel budget near $15 and enough daylight to finish in a day. This drive stays within the Midwest, taking you from one Missouri locale to another. It's primarily a surface road experience, making it a straightforward and relatively quick trip. Consider this route if you're looking for an uncomplicated drive connecting two points within the state without extensive highway time.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
48.9 miles from Saint Peters, MO
A natural place for your longest stop of the day
, about 58m into the drive
.
Main Roads
Road
Distance
Duration
Avenue of the Saints
78.6 mi
1h 32m
I 70
11.1 mi
13m
Veterans Road
3.2 mi
5m
US 61 Business
2.2 mi
4m
MO W
1.7 mi
2m
Paris Gravel Road
0.5 mi
1m
County Road 422
<0.1 mi
<1m
South Main Street
—
—
Some road-level metrics are being recalculated.
Longest stretch:
Avenue of the Saints
— 78.6 mi, about 1h 32m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters, MO and Palmyra, MO.
1
Start on I 70
11 mi·13 min·I 70
Use the straight / slight right lanes.
2
Take the exit
0.4 mi·47 sec
Exit 210BToward US 61 North: HannibalUse the slight right lane.
3
Merge onto US 61
73 mi·1 hr 26 min·Avenue of the Saints
Use the right lane.
4
Take the exit
249 ft·14 sec
5
Turn left onto Paris Gravel Road
0.5 mi·1 min·Paris Gravel Road
6
Keep slight right at fork onto County Road 422
279 ft·8 sec·County Road 422
7
Turn right onto Veterans Road
3.2 mi·5 min·Veterans Road
8
Turn left onto MO W
1.7 mi·2 min·MO W
9
Turn left onto US 61
5.3 mi·6 min·Avenue of the Saints
10
Take the exit onto US 61 Business
2.2 mi·4 min·US 61 Business
11
Arrive at destination
US 61 Business
Trip Plan
Since this is a short, 2-hour drive, you have plenty of flexibility. Aim to leave Saint Peters in the morning to maximize your daylight. With only 97.7 miles, you likely won't need many long breaks, but keep an eye on your fuel gauge, especially on the longer surface road segments. The estimated fuel cost is around $15. Plan for a brief stop if needed, but the flexibility of a shorter drive means you can easily adapt to your schedule.
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 48.9 miles from Saint Peters, MO, or about 58m into the drive.
The longest continuous stretch on this route runs about 78.6 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 21 miles or 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 48.9 miles or 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 1h 35m
Traffic, exits, and arrival timing usually matter more near Palmyra, 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 97.7 miles and 2h.
Your first comfortable stop window is around 21 miles from Saint Peters, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on Avenue of the Saints for about 78.6 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 9
5 decision points cluster between mile 0 and 85.3 — 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.
7
11.1 mi into trip|~13m in
Take the exit toward US 61 North: Hannibal
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 210B
Toward US 61 North: Hannibal
5
11.5 mi into trip|~14m in|US 61 / Avenue of the Saints
Merge onto US 61 / Avenue of the Saints
Merge point - match speed before joining. Lane positioning matters here
Use the right lane.
4
84.8 mi into trip|~1h 41m in|Paris Gravel Road
Turn left onto Paris Gravel Road
Navigation decision point
4
85.3 mi into trip|~1h 42m in|County Road 422
Keep slight right at fork onto County Road 422
Highway fork - watch signs carefully
Fuel & Cost
Regular Gas
$15.27 one way
$30.55 round trip
$3.97/gal25.4 MPG avg34 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$16.77
$33.54
premium
$4.89
$18.80
$37.60
diesel
$5.61
$21.57
$43.14
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$15
Meals
$25–$50
Total
$40–$65
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 34.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $10 in charging
· 0 stops
· 68% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
29.3
0
$10.26
$4.69
Efficient EV
24.4
0
$8.55
$3.91
EV Truck/SUV
39.1
0
$13.68
$6.25
Gas CO2
34 kg
EV CO2
11 kg (68% 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 20, 2026
Origin
Saint Peters, MO
Morning
in Saint Peters on Tuesday
Local time
7:33 AM
CDT
Current temp
71°F
Unavailable
Live forecast
Destination
Palmyra, MO
Morning
in Palmyra on Tuesday
Local time
7:33 AM
CDT
Current temp
50°F
Unavailable
Live forecast
68°F
Troy, MO
49 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
21 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
2h 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.
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 mostly on surface roads, with only 14% of the 97.7 miles being highway. You'll spend the majority of your time on local routes, experiencing more of the immediate landscape. The longest stretch without a significant change in road type is 78.6 miles on the Avenue of the Saints. Expect to encounter more intersections and potentially slower speeds as you transition away from any highway segments.
Only 14% highway — the rest is turn-by-turn surface driving.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 78.6 mi on Avenue of the Saints.
How Hard Is This Drive?
5/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive near I 70.
Driving Effort5/10
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 97.7 miles you will encounter 9 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: near the start (I 70): Lane positioning matters here; at 11.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 11.5 miles (US 61 / Avenue of the Saints): Merge point - match speed before joining. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h. Total distance: 97.7 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (14%). Some complex stretches to watch for.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 78.6 miles on Avenue of the Saints. The full list of main roads is in the Roads section above.
Yes — we found about 3 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: near the start (I 70): Lane positioning matters here; at 11.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 11.5 miles (US 61 / Avenue of the Saints): Merge point - match speed before joining. Lane positioning matters here.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Palmyra, MO before heading back.
