Embarking on the 344-mile journey from San Antonio to Post takes you across the Texas landscape in approximately 6 hours and 1 minute. Because this route relies on local roads rather than major highways, it is best suited for a single, focused day of driving. Budgeting about $51 for fuel is a smart starting point for your trip planning. Both your starting point in San Antonio and your destination in Post are situated within the Great Plains region, offering a consistent geographic backdrop throughout your travel. While the drive is manageable in one go, the turn-heavy nature of the route means you should be prepared for a more active day behind the wheel than a standard interstate cruise.
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
172 miles from San Antonio, TX
A natural place for your longest stop of the day
, about 2h 58m into the drive
.
Main Roads
Road
Distance
Duration
I 10
98.7 mi
1h 37m
US 84
75.7 mi
1h 16m
Frisco Avenue
41.9 mi
44m
State Highway 153
29.5 mi
33m
North Main Street
29.3 mi
30m
Roberts Avenue
16.5 mi
18m
McDermott Freeway
12.8 mi
14m
FM 2111
12.3 mi
13m
Longest stretch:
I 10
— 98.7 mi, about 1h 37m
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio, TX and Post, TX.
1
Start on Dolorosa Street
143 ft·4 sec·Dolorosa Street
2
Continue on West Market Street
0.2 mi·28 sec·West Market Street
3
Turn left onto Navarro Street
0.8 mi·1 min·Navarro Street
4
Enter roundabout onto San Pedro Avenue
85 ft·1 sec·San Pedro Avenue
5
Continue on San Pedro Avenue
0.5 mi·1 min·San Pedro Avenue
6
Turn left onto West Cypress Street
0.1 mi·10 sec·West Cypress Street
Use the left lane.
7
Turn straight onto East Fredericksburg Road
1.2 mi·2 min·East Fredericksburg Road
8
Turn right onto Interstate 10 West
0.1 mi·13 sec·Interstate 10 West
9
Take the ramp
0.1 mi·13 sec
Toward I 10 West, US 87 North
10
Merge onto I 10; US 87
13 mi·14 min·McDermott Freeway
Use the straight / slight right lanes.
11
Keep slight right at fork onto I 10; US 87
99 mi·1 hr 37 min·I 10; US 87
Use the straight / slight left lanes.
12
Take the exit onto US 83
0.3 mi·44 sec·US 83
Exit 456Toward US 83 North, US 377: Junction, Menard
13
Turn right onto US 83; US 377
29 mi·30 min·North Main Street
Use the right lane.
14
Continue on US 83
42 mi·44 min·Frisco Avenue
15
Continue on US 83
17 mi·18 min·Roberts Avenue
16
Turn right onto US 67; US 83
387 ft·18 sec·Hutchings Avenue
Use the right lane.
17
Turn left onto TX 158
6.3 mi·7 min·North Broadway Street
Use the left lane.
18
Turn right onto FM 2111
12 mi·13 min·FM 2111
19
Turn left onto TX 153
29 mi·33 min·State Highway 153
20
Keep slight right at fork onto TX 153
19 ft·0 sec·State Highway 153
21
Turn right onto TX 70
10 mi·10 min·State Highway 70
22
Continue on TX 70
0.8 mi·1 min·Lamar Street
23
Turn left onto Northwest Georgia Avenue
0.1 mi·16 sec·Northwest Georgia Avenue
24
Take the ramp
340 ft·8 sec
Toward I 20 West: Midland
25
Merge onto I 20; US 84
6.0 mi·5 min·I 20; US 84
26
Take the exit onto US 84
0.3 mi·19 sec·US 84
Exit 238AToward US 84 West: Snyder, Lubbock
27
Keep slight left at fork onto US 84
75 mi·1 hr 16 min·US 84
28
Turn left onto West Main Street
298 ft·15 sec·West Main Street
29
Arrive at destination
West Main Street
Trip Plan
Since this is a turn-heavy local drive, you should prioritize departing early in the morning to ensure you have plenty of daylight for navigating the various street transitions. With a total duration of just over 6 hours, you can comfortably complete the trip in one day with at least one planned stop to stretch your legs and refuel. Keep your $51 fuel budget in mind, as local roads can sometimes lead to more variable fuel consumption than steady highway driving. Pay close attention to your navigation as you move through city streets, as the lack of long highway stretches means you will be turning more often than you might expect. Flexibility is your biggest advantage here, so don't hesitate to pull over for a quick break whenever you feel the need to reset.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 172 miles from San Antonio, TX, or about 2h 58m into the drive.
The longest continuous stretch on this route runs about 98.7 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 76 miles or 1h 19m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 172 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 5h
Traffic, exits, and arrival timing usually matter more near Post, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving San Antonio, 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 San Antonio, TX
This is one driving day of about 344 miles and 6h 1m.
Your first comfortable stop window is around 76 miles from San Antonio, 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 I 10 for about 98.7 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 19
5 decision points cluster between mile 16.1 and 268.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
16.1 mi into trip|~20m in|I 10; US 87
Keep slight right at fork onto I 10; US 87
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
6
114.7 mi into trip|~1h 58m in|US 83
Take the exit onto US 83 toward US 83 North, US 377: Junction, Menard
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 456
Toward US 83 North, US 377: Junction, Menard
6
202.8 mi into trip|~3h 32m in|US 67; US 83 / Hutchings Avenue
Turn right onto US 67; US 83 / Hutchings Avenue
Lane positioning matters here
Use the right lane.
6
202.8 mi into trip|~3h 32m in|TX 158 / North Broadway Street
Turn left onto TX 158 / North Broadway Street
Lane positioning matters here
Use the left lane.
6
268.3 mi into trip|~4h 44m in|US 84
Take the exit onto US 84 toward US 84 West: Snyder, Lubbock
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 238A
Toward US 84 West: Snyder, Lubbock
Fuel & Cost
Regular Gas
$51.98 one way
$103.96 round trip
$3.84/gal25.4 MPG avg120 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$56.90
$113.79
premium
$4.54
$61.42
$122.84
diesel
$5.61
$75.95
$151.90
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$52
Meals
$25–$50
Total
$77–$102
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 120.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $36 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
103.2
1
$36.12
$16.51
Efficient EV
86
0
$30.10
$13.76
EV Truck/SUV
137.6
1
$48.16
$22.02
Gas CO2
120 kg
EV CO2
40 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 Apr 15, 2026
Origin
San Antonio, TX
Late night
in San Antonio on Sunday
Local time
1:01 AM
CDT
Current temp
77°F
Unavailable
Live forecast
Destination
Post, TX
Late night
in Post on Sunday
Local time
1:01 AM
CDT
Current temp
83°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
6 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
6h 1m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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.
San Antonio Missions National Historical Park
National Historical Park
Welcome to San Antonio Missions, a National Park Service site and the only UNESCO World Heritage Site in Texas. Each mission in the park is a center of community and has been since the early 1700s. Th...
Lyndon B. Johnson National Historical Park tells the story of our 36th president beginning with his ancestors until his final resting place on his beloved LBJ Ranch. This entire "circle of life" gives...
26 mi from route
~64 min detour
Free
near mile 47.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a unique driving experience that favors local roads over high-speed highway travel, as this route features zero percent highway share. You will navigate via West Market Street, Navarro Street, and San Pedro Avenue, creating a turn-heavy profile that demands your full attention. Because the longest stretch on any single road—specifically West Market Street—is effectively zero miles, you will be making frequent transitions between local thoroughfares. This is not a monotonous cruise; instead, it is a technical drive that keeps you engaged with the road layout. Plan for a steady pace that reflects the local, winding nature of this 344-mile trek.
71% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 98.7 mi on I 10.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 10 and US 84. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 16.1 miles in near I 10; US 87.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 19 significant decision points across 344 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 16.1 miles (I 10; US 87): Highway fork - watch signs carefully. Lane positioning matters here; at 114.7 miles (US 83): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 202.8 miles (US 67; US 83 / Hutchings Avenue): Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between San Antonio, TX and Post, TX, road signs point toward Menard and Lubbock.
San Antonio is the second largest city in the state of Texas and the 7th largest in the United States. It's the 24th largest metropolitan area in the country. Visited by more than 31 million annual visitors, San Antonio is a beautiful city at the axis of three different geological terrains: Hill Country, South Texas Plains and Prairie and Lakes. There's a lot to do in this city: fine art museums, historical missions and plenty of amusement parks in addition to great dining and lots of drinking. The culture and people are vibrant and interesting. San Antonio's downtown is one of the most lively in the nation.
Top landmarks
•Alamo Mission in San Antonio — historic place in San Antonio, Bexar County, Texas
•San Antonio Missions National Historical Park — historic district in San Antonio, Bexar County, Texas
•Fort Sam Houston — military base in San Antonio, Texas
Doable as a same-day drive at 6h 1m. Total distance: 344 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 1m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 98.7 miles on I 10. 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 Post, 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 16.1 miles (I 10; US 87): Highway fork - watch signs carefully. Lane positioning matters here; at 114.7 miles (US 83): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 202.8 miles (US 67; US 83 / Hutchings Avenue): Lane positioning matters here.
Yes — San Antonio Missions National Historical Park and Lyndon B Johnson National Historical 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 12.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Post, TX before the return drive.
