Saint Jo, TX to Montopolis, TX is 276.7 miles and takes about 4h 52m via North South Freeway and I 35, with a fuel budget near $40 and enough daylight to finish in a day. This trip stays within the Great Plains region, offering a straightforward drive across Texas. Expect mostly highway cruising, making it a practical choice if you need to cover ground efficiently. The relatively short duration and modest fuel cost make this a manageable one-day excursion.
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
138.3 miles from Saint Jo, TX
A natural place for your longest stop of the day
, about 2h 26m into the drive
.
Main Roads
Road
Distance
Duration
North South Freeway
84.6 mi
1h 27m
I 35
81.8 mi
1h 24m
Purple Heart Trail
37.9 mi
39m
Broad Street
21.9 mi
24m
I 35W
17.2 mi
18m
I 35W TEXpress
16.7 mi
16m
North Jack Kultgen Expressway
6.6 mi
7m
Bergstrom Expressway
4.8 mi
5m
Longest stretch:
North South Freeway
— 84.6 mi, about 1h 27m
Traffic on I-35
Hour-of-day weekday pattern from 46 FHWA count stations on your route.
Peak
3 PM
~3,220 veh/hr typical
· worst 3,947
Quietest
2 AM
~498 veh/hr
Peak-to-quiet ratio
6.5×
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 Jo, TX and Montopolis, TX.
1
Start on US 82
22 mi·24 min·Broad Street
2
Turn right onto North Interstate 35
0.8 mi·1 min·North Interstate 35
3
Take the ramp
0.2 mi·24 sec
4
Merge onto I 35
29 mi·29 min·I 35
Use the slight right lane.
5
Take the exit onto I 35W
17 mi·18 min·I 35W
Exit 467Toward I 35W South, FM 1515: Fort WorthUse the straight / slight right lanes.
6
Keep slight left at fork onto I 35W Express
17 mi·16 min·I 35W TEXpress
Use the straight / slight left lanes.
7
Merge onto I 35W
85 mi·1 hr 27 min·North South Freeway
Use the straight / slight right lanes.
8
Continue on I 35; US 77
6.6 mi·7 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
9
Continue on I 35
38 mi·39 min·Purple Heart Trail
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 35
53 mi·54 min·I 35
Use the straight / slight right lanes.
11
Take the exit
0.3 mi·33 sec
Exit 240BToward US 183: Lockhart, LampasasUse the straight / slight right lanes.
12
Keep slight left at fork
0.9 mi·1 min
Toward US 183 South: LockhartUse the slight left lane.
13
Merge onto US 183
2.2 mi·2 min·US 183
Use the straight / slight right lanes.
14
Continue on 183 Toll
4.8 mi·5 min·Bergstrom Expressway
Use the straight / slight right lanes.
15
Take the exit
0.3 mi·35 sec
Toward Montopolis Drive, Patton AvenueUse the slight right lane.
16
Turn straight onto US 183
0.4 mi·30 sec·Ed Bluestein Boulevard
17
Take the ramp
486 ft·11 sec
Toward 183 Toll South: Lockhart
18
Arrive at destination
Toward 183 Toll South: Lockhart
Trip Plan
To make the most of this 276.7-mile drive, consider an early morning departure to avoid potential traffic, especially as you approach Montopolis. With a total estimated drive time of under five hours and a fuel cost around $40, you can easily complete this trip in one day. Plan your single stop strategically, perhaps around the halfway point, to stretch your legs and refuel if needed. Keep an eye on your fuel gauge, as the longest stretch without a major break is 84.6 miles on the North South Freeway.
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 138.3 miles from Saint Jo, TX, or about 2h 26m into the drive.
The longest continuous stretch on this route runs about 84.6 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 61 miles or 1h 6m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 138.3 miles or 2h 26m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 58m
Traffic, exits, and arrival timing usually matter more near Montopolis, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Jo, TX 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 Jo, TX
This is one driving day of about 276.7 miles and 4h 52m.
Your first comfortable stop window is around 61 miles from Saint Jo, TX.
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 North South Freeway for about 84.6 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 12
5 decision points cluster between mile 52 and 275.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
52 mi into trip|~56m in|I 35W
Take the exit onto I 35W toward I 35W South, FM 1515: Fort Worth
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 467
Toward I 35W South, FM 1515: Fort Worth
6
69.3 mi into trip|~1h 15m in|I 35W Express / I 35W TEXpress
Keep slight left at fork onto I 35W Express / I 35W TEXpress
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
8
267.8 mi into trip|~4h 41m in
Take the exit toward US 183: Lockhart, Lampasas
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 240B
Toward US 183: Lockhart, Lampasas
7
268 mi into trip|~4h 41m in
Keep slight left at fork toward US 183 South: Lockhart
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward US 183 South: Lockhart
7
275.9 mi into trip|~4h 51m in
Take the exit toward Montopolis Drive, Patton Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward Montopolis Drive, Patton Avenue
Fuel & Cost
Regular Gas
$37.90 one way
$75.80 round trip
$3.48/gal25.4 MPG avg97 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$3.89
$42.33
$84.67
premium
$4.23
$46.03
$92.05
diesel
$4.80
$52.25
$104.49
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$38
Meals
$25–$50
Total
$63–$88
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 96.8 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $29 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
83
1
$29.05
$13.28
Efficient EV
69.2
0
$24.21
$11.07
EV Truck/SUV
110.7
1
$38.74
$17.71
Gas CO2
97 kg
EV CO2
32 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 18, 2026
Origin
Saint Jo, TX
Afternoon
in Saint Jo on Sunday
Local time
1:51 PM
CDT
Current temp
73°F
Partly Cloudy
S 5 to 10 mph7% chanceLive forecast
Flood Warning
Flood Warning issued July 17 at 9:59PM CDT until July 19 at 6:17PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 17 at 9:59PM CDT until July 19 at 5:00AM CDT by NWS Austin/San Antonio TX
Destination
Montopolis, TX
Afternoon
in Montopolis on Sunday
Local time
1:51 PM
CDT
Current temp
76°F
Mostly Cloudy
SSE 5 mph1% chanceLive forecast
Flood Warning
Flood Warning issued July 17 at 9:59PM CDT until July 19 at 6:17PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 17 at 9:59PM CDT until July 19 at 5:00AM CDT by NWS Austin/San Antonio TX
100°F
Italy, TX
138 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
3 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 52m 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.
Waco Mammoth National Monument
National Monument
Standing as tall as 14 feet and weighing 20,000 pounds, Columbian mammoths roamed across what is present-day Texas thousands of years ago. Today, the fossil specimens represent the nation's first and...
4 mi from route
~11 min detour
Free
near mile 171.7
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend about 78% of your 276.7 miles on the highway. The longest continuous stretch on a highway is 84.6 miles along the North South Freeway. After this, you'll transition to surface roads for the remainder of the 4h 52m trip. Expect frequent exits and merging traffic as you approach urban areas.
78% highway — fuel and pacing are the main things to plan.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 84.6 mi on North South Freeway.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on North South Freeway and I 35. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 52 miles in near I 35W.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 12 significant decision points across 276.7 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 52 miles (I 35W): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 69.3 miles (I 35W Express / I 35W TEXpress): Highway fork - watch signs carefully. Lane positioning matters here; at 267.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
1,142 ft463 ft
Total Climb
465 ft
Total Descent
1,144 ft
Highest Point
1,142 ft
Elevation Range
679 ft
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 Saint Jo, TX to Montopolis, TX, road signs begin pointing toward Fm 1515: Fort Worth along the way.
Doable as a same-day drive at 4h 52m. Total distance: 276.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 52m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (78%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 84.6 miles on North South Freeway. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Montopolis, TX before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 52 miles (I 35W): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 69.3 miles (I 35W Express / I 35W TEXpress): Highway fork - watch signs carefully. Lane positioning matters here; at 267.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Waco Mammoth National Monument. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.9 hours each way, an in-and-out day trip would put you behind the wheel for 9.8 hours — manageable with a long break at Montopolis, TX, but most travelers stay overnight.
