The drive from Sulphur Springs, TX to Killeen, TX covers 234 miles and takes about 4h 9m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on South R L Thornton Freeway, I 30, Purple Heart Trail for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 89.9 miles on South R L Thornton Freeway.
At current regular gas prices, budget about $35.36 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
117 miles from Sulphur Springs, TX
A natural place for your longest stop of the day
, about 2h 5m into the drive
.
Sulphur Springs was founded in 1854, though it was then known as "Bright Star", and is in the Blackland Prairie region of Texas. Though the springs that brought about the name have more or less vanished, it is now known as "The Dairy Capital of Texas", with a museum cultured to that very point, even if the dairy industry has waned a bit around here in the early 21st century.
Doable as a same-day drive at 4h 9m. Total distance: 234 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 9m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (81%). Some complex stretches to watch for.
Drive Character
This is a 4h 9m highway drive covering 234 miles, with most of the trip on South R L Thornton Freeway and I 30. The longest continuous stretch is about 89.9 miles on South R L Thornton Freeway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 23 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
South R L Thornton Freeway is the longest continuous segment at about 89.9 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on South R L Thornton Freeway and I 30. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 79.9 miles in.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 15 significant decision points across 234 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 79.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 80.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 80.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 15 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
79.9 mi into trip|~1h 25m in
Take the exit toward I 35E: Denton, Waco
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 46A
Toward I 35E: Denton, Waco
9
80.6 mi into trip|~1h 27m in
Keep slight left at fork toward I 35E North, I 35E South: Denton, Waco
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 35E North, I 35E South: Denton, Waco
7
80.6 mi into trip|~1h 27m in
Keep slight left at fork toward I 35E South: Waco
Highway fork - watch signs carefully. Lane positioning matters here
Use the left / right lanes.
Toward I 35E South: Waco
8
215.4 mi into trip|~3h 47m in|I 14; US 190 / Central Texas Expressway
Keep slight right at fork onto I 14; US 190 / Central Texas Expressway toward US 190 West: Killeen, Fort Cavazos
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward US 190 West: Killeen, Fort Cavazos
8
228.5 mi into trip|~4h in
Take the exit toward FM 3470: Rosewood Drive, Stan Schlueter Loop
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 287
Toward FM 3470: Rosewood Drive, Stan Schlueter...
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Sulphur Springs, TX and Killeen, TX, road signs point toward Waco, Denton, Dallas Zoo and Fort Cavazos.
Waco
79.9 mi in|~1h 25m
Denton
80.5 mi in|~1h 27m
Dallas Zoo
81.6 mi in|~1h 28m|via I 35E
Fort Cavazos
215.4 mi in|~3h 47m|via I 14; US 190
Main Roads
Road
Distance
Duration
South R L Thornton Freeway
89.9 mi
1h 32m
I 30
78.1 mi
1h 22m
Purple Heart Trail
37.9 mi
39m
Central Texas Expressway
13.1 mi
13m
North Jack Kultgen Expressway
6.6 mi
7m
West Central Texas Expressway
2.9 mi
3m
South W.S. Young Drive
1.3 mi
2m
Gilmer Street
1.3 mi
1m
Longest stretch:
South R L Thornton Freeway
— 89.9 mi, about 1h 32m
Turn-by-Turn Driving Directions
Step-by-step road directions between Sulphur Springs, TX and Killeen, TX.
1
Start on US 67 Bus; TX 154
116 ft·3 sec·Jefferson Street West
2
Turn left onto TX 154
254 ft·4 sec·Gilmer Street
3
Turn straight onto TX 154
1.2 mi·1 min·Gilmer Street
4
Continue on TX 154
0.3 mi·30 sec·South Broadway Street
5
Turn right onto Industrial Drive West
0.1 mi·11 sec·Industrial Drive West
6
Take the ramp
0.2 mi·24 sec
7
Merge onto I 30; US 67
78 mi·1 hr 22 min·I 30; US 67
Use the straight / slight right lanes.
8
Take the exit
0.6 mi·1 min
Exit 46AToward I 35E: Denton, WacoUse the straight / slight right lanes.
9
Keep slight left at fork
0.1 mi·14 sec
Toward I 35E South, I 35E North: Waco, Denton
10
Keep slight left at fork
221 ft·5 sec
Toward I 35E North, I 35E South: Denton, WacoUse the straight / slight right lanes.
11
Keep slight left at fork
0.4 mi·30 sec
Toward I 35E South: WacoUse the left / right lanes.
12
Continue on I 35E
0.5 mi·44 sec·South R L Thornton Freeway
13
Continue on I 35E
89 mi·1 hr 31 min·South R L Thornton Freeway
Exit 426Toward Dallas ZooUse the straight / slight right lanes.
14
Continue on I 35; US 77
6.6 mi·7 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
15
Continue on I 35
38 mi·39 min·Purple Heart Trail
Use the straight / slight right lanes.
16
Keep slight right at fork onto I 14; US 190
13 mi·13 min·Central Texas Expressway
Toward US 190 West: Killeen, Fort CavazosUse the straight / slight right lanes.
17
Take the exit
0.3 mi·32 sec
Exit 287Toward FM 3470: Rosewood Drive, Stan Schlueter LoopUse the slight right lane.
18
Turn straight onto West Central Texas Expressway
2.9 mi·3 min·West Central Texas Expressway
19
Turn right onto South W.S. Young Drive
1.3 mi·2 min·South W.S. Young Drive
20
Turn left onto US 190 Bus
1.0 mi·1 min·East Veterans Memorial Boulevard
21
Turn right
83 ft·8 sec
22
Turn right
74 ft·5 sec
23
Arrive at destination
Trip Plan
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 117 miles from Sulphur Springs, TX, or about 2h 5m into the drive.
The longest continuous stretch on this route runs about 89.9 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 51 miles or 55m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 117 miles or 2h 5m 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 22m
Traffic, exits, and arrival timing usually matter more near Killeen, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Sulphur Springs, 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 Sulphur Springs, TX
This is one driving day of about 234 miles and 4h 9m.
Your first comfortable stop window is around 51 miles from Sulphur Springs, 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 South R L Thornton Freeway for about 89.9 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 117 mi from Sulphur Springs, TX
· 2h 5m into the drive
The midpoint is around 117 miles from Sulphur Springs, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before South R L Thornton Freeway if your tank is already low. That segment runs about 89.9 miles.
Arriving in Killeen, TX
The final approach into Killeen, 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 Killeen, 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...
4 mi from route
~10 min detour
Free
near mile 169.4
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$35.36 one way
$70.72 round trip
$3.84/gal25.4 MPG avg82 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$38.70
$77.40
premium
$4.54
$41.78
$83.56
diesel
$5.61
$51.66
$103.33
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 81.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $25 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
70.2
0
$24.57
$11.23
Efficient EV
58.5
0
$20.47
$9.36
EV Truck/SUV
93.6
1
$32.76
$14.98
Gas CO2
82 kg
EV CO2
27 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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
Sulphur Springs, TX
Late night
in Sulphur Springs on Saturday
Local time
1:40 AM
CDT
Current temp
75°F
Unavailable
Live forecast
Destination
Killeen, TX
Late night
in Killeen on Saturday
Local time
1:40 AM
CDT
Current temp
60°F
Unavailable
Live forecast
59°F
Italy, TX
117 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
15 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 9m 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.
Frequently Asked Questions
The drive from Sulphur Springs, TX to Killeen, TX covers 234 miles and takes about 4h 9m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are South R L Thornton Freeway, I 30, Purple Heart Trail. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 117 miles from Sulphur Springs, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $35.36 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
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 15 significant decision points across 234 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 79.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 80.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 80.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Between Sulphur Springs, TX and Killeen, TX, road signs point toward Waco, Denton, Dallas Zoo and Fort Cavazos.
Yes. Nearby national parks include Waco Mammoth National Monument.
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.
