The drive from Killeen, TX to Mercedes, TX covers 406.3 miles and takes about 7h 4m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on TX 130 Toll, South Nueces Street, I 37 for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 86.1 miles on TX 130 Toll.
At current regular gas prices, budget about $61.39 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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
203.1 miles from Killeen, TX
A natural place for your longest stop of the day
, about 3h 24m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 4m. Total distance: 406.3 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 4m drive, plan rest stops for pacing.
Drive Character
This is a 7h 4m highway drive covering 406.3 miles, with most of the trip on TX 130 Toll and South Nueces Street. The longest continuous stretch is about 86.1 miles on TX 130 Toll.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 28 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
TX 130 Toll is the longest continuous segment at about 86.1 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on TX 130 Toll and South Nueces Street. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 121.4 miles in.
Driving Effort10/10
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 21 significant decision points across 406.3 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 121.4 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 142.5 miles (I 10; US 90; TX 130): Highway fork - watch signs carefully. Lane positioning matters here; at 162.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 21 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
7
121.4 mi into trip|~1h 59m in
Keep slight right at fork toward I 10 West: San Antonio
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward I 10 West: San Antonio
6
142.5 mi into trip|~2h 21m in|I 10; US 90; TX 130
Keep slight left at fork onto I 10; US 90; TX 130
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
162.6 mi into trip|~2h 43m 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
162.8 mi into trip|~2h 43m 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
7
405.3 mi into trip|~7h 3m in
Take the exit toward FM 491: Texas Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 163B
Toward FM 491: Texas Avenue
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 Killeen, TX to Mercedes, TX, road signs begin pointing toward Corpus Christi along the way.
The midpoint is around 203.1 miles from Killeen, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before TX 130 Toll if your tank is already low. That segment runs about 86.1 miles.
Arriving in Mercedes, TX
The final approach into Mercedes, 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 Mercedes, 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.
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...
4 mi from route
~11 min detour
Free
near mile 168.1
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...
29 mi from route
~73 min detour
Free
near mile 406.3
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$61.39 one way
$122.79 round trip
$3.84/gal25.4 MPG avg142 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$67.20
$134.40
premium
$4.54
$72.54
$145.08
diesel
$5.61
$89.71
$179.41
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$61
Meals
$25–$50
Total
$86–$111
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 142.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $43 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
121.9
1
$42.66
$19.50
Efficient EV
101.6
1
$35.55
$16.25
EV Truck/SUV
162.5
2
$56.88
$26.00
Gas CO2
142 kg
EV CO2
48 kg (66% 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
Killeen, TX
Morning
in Killeen on Friday
Local time
11:13 AM
CDT
Current temp
60°F
Unavailable
Live forecast
Destination
Mercedes, TX
Morning
in Mercedes on Friday
Local time
11:13 AM
CDT
Current temp
69°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
9 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
7h 4m 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 Killeen, TX to Mercedes, TX covers 406.3 miles and takes about 7h 4m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are TX 130 Toll, South Nueces Street, I 37. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 203.1 miles from Killeen, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $61.39 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 2 meaningful breaks 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 21 significant decision points across 406.3 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 121.4 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 142.5 miles (I 10; US 90; TX 130): Highway fork - watch signs carefully. Lane positioning matters here; at 162.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from Killeen, TX to Mercedes, TX, road signs begin pointing toward Corpus Christi along the way.
Yes. Nearby national parks include San Antonio Missions National Historical Park and Palo Alto Battlefield 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.
