The drive from Lake Kiowa, TX to San Antonio, TX covers 342 miles and takes about 6h 21m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Purple Heart Trail, North South Freeway, I 35 for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 99.6 miles on Purple Heart Trail.
At current regular gas prices, budget about $51.68 one way before food or hotel costs.
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
171 miles from Lake Kiowa, TX
A natural place for your longest stop of the day
, about 3h 16m into the drive
.
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.
Doable as a same-day drive at 6h 21m. Total distance: 342 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 21m drive, plan rest stops for pacing.
Drive Character
This is a 6h 21m highway drive covering 342 miles, with most of the trip on Purple Heart Trail and North South Freeway. The longest continuous stretch is about 99.6 miles on Purple Heart Trail.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 43 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Purple Heart Trail is the longest continuous segment at about 99.6 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Purple Heart Trail and North South Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 41.5 miles in near I 35W.
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 29 significant decision points across 342 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 41.5 miles (I 35W): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 260.4 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 333.9 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 29 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
41.5 mi into trip|~1h 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
8
260.4 mi into trip|~4h 49m in|I 35; US 290 / Purple Heart Trail
Keep slight left at fork onto I 35; US 290 / Purple Heart Trail toward 32nd Street, Dean Keeton Street
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward 32nd Street, Dean Keeton Street
7
333.9 mi into trip|~6h 10m in|I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 35 South
8
340.3 mi into trip|~6h 18m in|I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South: Lower Level, Laredo
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward I 35 South: Lower Level, Laredo
8
340.8 mi into trip|~6h 19m in
Take the exit toward Lexington Avenue, Main Avenue, San Pedro 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.
Exit 157A
Toward Lexington Avenue, Main Avenue, San Pedro...
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 Lake Kiowa, TX to San Antonio, TX, road signs begin pointing toward Fm 1515: Fort Worth along the way.
The midpoint is around 171 miles from Lake Kiowa, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before Purple Heart Trail if your tank is already low. That segment runs about 99.6 miles.
Arriving in San Antonio, TX
The final approach into San Antonio, TX 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 San Antonio, TX.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
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...
6 mi from route
~16 min detour
Free
near mile 165.1
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...
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$51.68 one way
$103.35 round trip
$3.84/gal25.4 MPG avg120 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$56.56
$113.13
premium
$4.54
$61.06
$122.12
diesel
$5.61
$75.51
$151.02
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: 119.7 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
102.6
1
$35.91
$16.42
Efficient EV
85.5
0
$29.92
$13.68
EV Truck/SUV
136.8
1
$47.88
$21.89
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
Lake Kiowa, TX
Late night
in Lake Kiowa on Saturday
Local time
1:38 AM
CDT
Current temp
58°F
Unavailable
Live forecast
Destination
San Antonio, TX
Late night
in San Antonio on Saturday
Local time
1:38 AM
CDT
Current temp
77°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
19 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 21m 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.
Frequently Asked Questions
The drive from Lake Kiowa, TX to San Antonio, TX covers 342 miles and takes about 6h 21m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Purple Heart Trail, North South Freeway, I 35. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 171 miles from Lake Kiowa, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $51.68 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 29 significant decision points across 342 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 41.5 miles (I 35W): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 260.4 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 333.9 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
On the drive from Lake Kiowa, TX to San Antonio, TX, road signs begin pointing toward Fm 1515: Fort Worth along the way.
Yes. Nearby national parks include Waco Mammoth National Monument and San Antonio Missions National Historical Park.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
