Service Plaza
0.1 mi from route
Trip from Austin, TX to Los Fresnos, TX
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Jul 19, 2026 · Editorial standards
Drive Time
6h 8m
Distance
342.2 mi
551 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$47
one way
EV Charging
Unknown
Best Time to Leave
4 AM
5h 56m
★
6 AM
6h 9m
8 AM
6h 34m
10 AM
6h 18m
12 PM
6h 15m
3 PM
6h 19m
5 PM
6h 33m
8 PM
6h 1m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Austin, TX
Wikimedia Commons
Los Fresnos, TX
Jeff Stapleton
Trip Overview
Austin to Los Fresnos is 342.2 miles and takes about 6h 8m via I 37 and U.S. Highway 77, with a fuel budget near $50 and enough daylight to finish in a day. This drive primarily stays within the Great Plains region of Texas, offering a consistent, straightforward trip. Given the relatively short duration and mostly highway profile, it's a manageable one-day excursion for most travelers. Plan for a full day of driving, but know that you can complete it without needing an overnight stay. The route offers a direct path south, ideal for those looking to reach their destination efficiently.
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
171.1 miles from Austin, TX
A natural place for your longest stop of the day , about 3h 1m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 37 | 118.7 mi | 1h 59m |
| U.S. Highway 77 | 102.6 mi | 1h 53m |
| Purple Heart Trail | 58.3 mi | 1h 3m |
| I 69E | 31.3 mi | 33m |
| Connally Loop | 11 mi | 12m |
| North Pan Am Expressway | 10 mi | 11m |
| Texas State Highway 100 | 4.2 mi | 5m |
| Interstate Highway 35 | 1.7 mi | 1m |
Longest stretch:
I 37
— 118.7 mi, about 1h 59m
Traffic on I-37
Hour-of-day weekday pattern from 14 FHWA count stations on your route.
Peak
3 PM
~1,146 veh/hr typical · worst 1,732
Quietest
2 AM
~151 veh/hr
Peak-to-quiet ratio
7.6×
busier at peak than in the quiet hours
12a
6a
noon
6p
11p
Averaged across 51 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 Austin, TX and Los Fresnos, TX.
1
Start on East 5th Street
0.5 mi
·
1 min
·
East 5th Street
Use the straight / right lanes.
2
At end of road, turn right onto North Interstate 35
0.4 mi
·
39 sec
·
North Interstate 35
Use the straight / slight left lanes.
3
Take the ramp
0.2 mi
·
21 sec
Toward I 35 South
4
Merge onto I 35; US 290
46 mi
·
50 min
·
Purple Heart Trail
Use the straight / slight right lanes.
5
Continue on I 35
1.7 mi
·
1 min
·
Interstate Highway 35
Use the straight / slight right lanes.
6
Continue on I 35
12 mi
·
12 min
·
Purple Heart Trail
Use the straight / slight right lanes.
7
Continue on I 35
10.0 mi
·
11 min
·
North Pan Am Expressway
Use the straight / slight right lanes.
8
Keep slight right at fork onto I 410
11 mi
·
12 min
·
Connally Loop
Toward I 410 South
Use the straight / slight right lanes.
9
Take the exit
0.2 mi
·
28 sec
Exit 41
Toward I 37, US 281 North: San Antonio, Corpus Christi
Use the straight / slight right lanes.
10
Keep slight left at fork
0.5 mi
·
1 min
Toward I 37 South: Corpus Christi
Use the slight left / slight right lanes.
11
Merge onto I 37
119 mi
·
1 hr 59 min
·
I 37
Use the straight / slight right lanes.
12
Take the exit onto I 69E; US 77
31 mi
·
33 min
·
I 69E; US 77
Toward I 69E, US 77: Kingsville, Brownsville
Use the straight / slight right lanes.
13
Keep slight left at fork onto US 77
61 mi
·
1 hr 9 min
·
U.S. Highway 77
14
Keep slight left at fork onto I 69E; US 77
41 mi
·
44 min
·
U.S. Highway 77
Use the straight / slight right lanes.
15
Take the exit
0.3 mi
·
39 sec
Exit 14
Toward TX 100, FM 1421: South Padre Island
Use the straight / slight right lanes.
16
Turn left onto TX 100
1.3 mi
·
1 min
·
State Highway 100
17
Continue on TX 100
4.2 mi
·
5 min
·
Texas State Highway 100
18
Continue on TX 100
1.0 mi
·
1 min
·
West Ocean Boulevard
19
Arrive at destination
TX 100
Trip Plan
Starting early from Austin will give you the most flexibility for this 6-hour drive. With a fuel cost estimated around $50, you'll want to fill up before leaving the city. The longest stretch without a major change in road type is 118.7 miles on I 37, so plan your stops accordingly. Consider a brief break around the halfway point, though with only one recommended stop, you have considerable freedom. Keep your fuel tank topped off as you get closer to your destination, as services can become more spread out.
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 171.1 miles from Austin, TX, or about 3h 1m into the drive.
The longest continuous stretch on this route runs about 118.7 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 75 miles or 1h 23m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 171.1 miles or 3h 1m 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 2m
Traffic, exits, and arrival timing usually matter more near Los Fresnos, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Austin, 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 Austin, TX
This is one driving day of about 342.2 miles and 6h 8m.
Your first comfortable stop window is around 75 miles from Austin, 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 37 for about 118.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
171 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 75 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 171.1 miles from Austin, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 37 if your tank is already low. That segment runs about 118.7 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Stops Along Your Drive
Picked by where they fit in your drive — first break, midpoint reset, final stretch.
Love's Travel Stop
0.1 mi from route
Picnic Area
0.1 mi from route
Buc-ee's
0.1 mi from route
Kenedy County Rest Area
0.1 mi from route
Flying J Travel Center
0.1 mi from route
Texas Travel Information Center at Harlingen
0.1 mi from route
San Patricio County Southbound Rest Area
0.1 mi from route
San Patricio County Northbound Rest Area
0.1 mi from route
Live Oak County Southbound Rest Area
0.1 mi from route
Live Oak County Northbound Rest Area
0.1 mi from route
Parking Area
0.1 mi from route
Picnic Area
0.1 mi from route
Picnic Area
0.1 mi from route
Love's Travel Stop
0.1 mi from route
Love's Travel Stop
0.1 mi from route
Road Ranger
0.1 mi from route
Service Plaza
0.1 mi from route
QuikTrip
0.1 mi from route
TA
0.2 mi from route
Pilot Travel Center
0.2 mi from route
Marlstone Retail Center
0.2 mi from route
Pilot Travel Center
0.3 mi from route
QuikTrip
0.4 mi from route
Pilot Travel Center
0.7 mi from route
Petro Stopping Centers
0.7 mi from route
TA
1.7 mi from route
Flying J Travel Center
1.8 mi from route
QuikTrip
2 mi from route
Austin Bat Tours
4.4
★ ★ ★ ★ ☆
Near the start, right off the route
0.2 mi from route
~1 min detour
Austin, Texas
Hours: 9 am–10 pm
Visit websiteFragile Planet Wildlife Park
4.9
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.9 mi from route
~2 min detour
Los Fresnos, Texas
Hours: 1–6 pm
+19567102025
Visit websiteThe Sophienburg Museum & Archives
4.6
★ ★ ★ ★ ★
Near the start, short detour
First break
1.3 mi from route
~3 min detour
New Braunfels, Texas
Hours: 10 am–4 pm
+18306291572
Visit websiteTube Chute
4.5
★ ★ ★ ★ ★
Near the start, short detour
First break
1.9 mi from route
~5 min detour
New Braunfels, Texas
+18302214000
Visit websiteBobz World
4.3
★ ★ ★ ★ ☆
Near the end, short detour
Home stretch
2.4 mi from route
~6 min detour
Los Fresnos, Texas
Hours: 9:30 am–5:30 pm
+19562332350
Visit websiteBotanical Gates of Paradise
4.1
★ ★ ★ ★ ☆
Near the start, short detour
1.7 mi from route
~4 min detour
Austin, Texas
Hours: 9 am–5 pm
US Army Medical Department Museum
4.7
★ ★ ★ ★ ★
Early in the drive, short detour
Early stretch
2.8 mi from route
~7 min detour
Fort Sam Houston, Texas
+12102216358
Visit websiteSan Antonio Botanical Garden
4.7
★ ★ ★ ★ ★
Early in the drive, short detour
Early stretch
3.2 mi from route
~8 min detour
San Antonio, Texas
Hours: 8 am–6 pm
+12105361400
Visit websitePlace data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 135 decision points cluster between mile 0.5 and 335.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0.5 mi into trip
|
~1m in
|
North Interstate 35
At end of road, turn right onto North Interstate 35
Lane positioning matters here
Use the straight / slight left lanes.
7
71.1 mi into trip
|
~1h 18m in
|
I 410 / Connally Loop
Keep slight right at fork onto I 410 / Connally Loop toward I 410 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 410 South
8
82 mi into trip
|
~1h 31m in
Take the exit toward I 37, US 281 North: San Antonio, Corpus Christi
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 41
Toward I 37, US 281 North: San Antonio, Corpus...
7
82.2 mi into trip
|
~1h 31m in
Keep slight left at fork toward I 37 South: Corpus Christi
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward I 37 South: Corpus Christi
8
335.4 mi into trip
|
~5h 59m in
Take the exit toward TX 100, FM 1421: South Padre Island
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 14
Toward TX 100, FM 1421: South Padre Island
Fuel & Cost
Regular Gas
$46.87 one way
$93.74 round trip
$3.48/gal
25.4 MPG avg
120 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $3.89 | $52.35 | $104.71 |
| premium | $4.23 | $56.92 | $113.84 |
| diesel | $4.80 | $64.61 | $129.23 |
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: 119.7 kg one way. Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $36 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 102.7 | 1 | $35.93 | $16.43 |
| Efficient EV | 85.6 | 0 | $29.94 | $13.69 |
| EV Truck/SUV | 136.9 | 1 | $47.91 | $21.90 |
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.
Origin
Austin, TX
Afternoon in Austin on Sunday
Local time
2:55 PM
CDT
Current temp
92°F
Partly Sunny
SSE 5 to 10 mph
6% chance
Live forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 7:12AM CDT until July 17 at 10:15AM CDT by NWS San Angelo TX
Flash Flood Warning
Flash Flood Warning issued July 17 at 7:00AM CDT until July 17 at 10:00AM CDT by NWS San Angelo TX
Destination
Los Fresnos, TX
Afternoon in Los Fresnos on Sunday
Local time
2:55 PM
CDT
Current temp
96°F
Mostly Sunny
SE 9 to 17 mph
2% chance
Live forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 7:12AM CDT until July 17 at 10:15AM CDT by NWS San Angelo TX
Flash Flood Warning
Flash Flood Warning issued July 17 at 7:00AM CDT until July 17 at 10:00AM CDT by NWS San Angelo TX
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
4 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 8m 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...
1 mi from route
~3 min detour
Free
near mile 82.6
View on nps.gov
Palo Alto Battlefield National Historical Park
National Historical Park
On May 8, 1846, U.S. and Mexican troops clashed on the prairie of Palo Alto. The battle was the first in a two-year long war that changed the map of North America. Although the two countries have deve...
3 mi from route
~9 min detour
Free
near mile 342.2
View on nps.gov
Padre Island National Seashore
National Seashore
Protecting sixty-six miles of wild coastline along the Gulf of America, the narrow barrier island is home to one of the last intact coastal prairie habitats in the United States. Along the hypersaline...
27 mi from route
~67 min detour
$25
near mile 259.6
View on nps.gov
Park data from the National Park Service API. Alerts update every 2 hours.
What kind of drive is this?
You'll spend about 79% of this 342.2-mile trip on highways, with the longest continuous stretch being 118.7 miles on I 37. Expect to transition from higher-speed interstate cruising to surface roads as you approach Los Fresnos. The extensive highway mileage means you'll experience a good amount of rural cruising before encountering more local traffic. Keep an eye out for the change in road conditions as you leave the interstate system.
79% highway — fuel and pacing are the main things to plan.
19 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 118.7 mi on I 37.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on I 37 and U.S. Highway 77. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.5 miles in near North Interstate 35.
Driving Effort
9/10
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 13 significant decision points across 342.2 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 0.5 miles (North Interstate 35): Lane positioning matters here; at 71.1 miles (I 410 / Connally Loop): Highway fork - watch signs carefully. Lane positioning matters here; at 82 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
699 ft
22 ft
Total Climb
224 ft
Total Descent
689 ft
Highest Point
699 ft
~48.9 mi in
Elevation Range
676 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Austin, TX and Los Fresnos, TX, road signs point toward Corpus Christi and Brownsville.
Corpus Christi
82 mi in
|
~1h 31m
Brownsville
201.5 mi in
|
~3h 32m
|
via I 69E; US 77
About the Cities
Starting in Austin, TX
Full guide →“City of the Violet Crown” · Founded 1835
Austin is a city of about 1,054,000 (2026) surpassing Fort Worth to become the 4th most populous city in Texas. It is on the southeast edge of the Hill Country region of Texas, making it the fourth-largest city in the state and the 11th-largest in the country. It is the capital of Texas and a college town, and also a center of an alternative culture away from the major cities on the US coasts, though the city is rapidly gentrifying with its rising popularity. Austin's attitude is commonly emblazoned about town on T-shirts and bumper stickers that read: "Keep Austin Weird." Austin is also marketed as the Live Music Capital of the World due to the large number of venues.
Top landmarks
- • Texas State Capitol — capitol and seat of government of the U.S. state of Texas
- • Lyndon Baines Johnson Library and Museum — presidential library and museum for U.S. President Lyndon B. Johnson in Austin,...
- • Texas State Cemetery — historic cemetery in Austin, Texas, USA
Arriving in Los Fresnos, TX
Full guide →City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 8m. Total distance: 342.2 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 8m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 118.7 miles on I 37. The full list of main roads is in the Roads section above.
Yes — we found about 29 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.
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 Los Fresnos, 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. There are 29 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.5 miles (North Interstate 35): Lane positioning matters here; at 71.1 miles (I 410 / Connally Loop): Highway fork - watch signs carefully. Lane positioning matters here; at 82 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — San Antonio Missions National Historical Park, Palo Alto Battlefield National Historical Park and Padre Island National Seashore. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.1 hours each way, a round trip means 12.3 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Los Fresnos, TX before the return drive.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, NPS for national parks, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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