Heading north from Round Rock, TX to Dallas, TX covers 177.3 miles and will take approximately 3 hours and 5 minutes. This drive is perfectly suited for a single-day trip, requiring no overnight stays. The estimated fuel cost for this journey is around $27. You'll primarily navigate on the Purple Heart Trail and I-35E, with a portion on the South Jack Kultgen Expressway. This route offers a mixed driving experience as you travel from the Great Plains region of Texas to the same region, indicating a consistent landscape. Plan for one stop along the way to break up the drive.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
88.7 miles from Round Rock, TX
A natural place for your longest stop of the day
, about 1h 33m into the drive
.
Step-by-step road directions between Round Rock, TX and Dallas, TX.
1
Start on South Mays Street
467 ft·18 sec·South Mays Street
2
Turn left onto West Liberty Avenue
0.1 mi·17 sec·West Liberty Avenue
3
At end of road, turn right onto Round Rock Avenue
0.3 mi·36 sec·Round Rock Avenue
4
Turn right onto North Interstate 35
0.3 mi·23 sec·North Interstate 35
5
Take the ramp
0.2 mi·27 sec
Toward I 35 North
6
Merge onto I 35
78 mi·1 hr 20 min·Purple Heart Trail
Use the straight / slight right lanes.
7
Continue on I 35
6.6 mi·7 min·South Jack Kultgen Expressway
Use the straight / slight right lanes.
8
Continue on I 35; US 77
33 mi·33 min·Purple Heart Trail
Use the straight / slight right lanes.
9
Keep slight right at fork onto I 35E
58 mi·1 hr·I 35E
Toward I 35E: DallasUse the slight right lane.
10
Take the exit
0.2 mi·30 sec
Exit 429AToward Continental AvenueUse the slight right lane.
11
Turn right onto Continental Avenue
0.2 mi·31 sec·Continental Avenue
Use the right lane.
12
Turn slight right onto North Lamar Street
433 ft·10 sec·North Lamar Street
13
Arrive at destination
North Lamar Street
Trip Plan
Given this is a manageable 1-day drive, you have flexibility on when to depart. Leaving Round Rock in the morning should get you to Dallas with plenty of daylight. The route includes one recommended stop, so consider planning that break around the halfway point to stretch your legs and refuel if necessary. Keep an eye on your fuel gauge, especially during the 111.1-mile stretch on the Purple Heart Trail, as services might be less frequent than on the interstate. This relatively short distance makes it easy to adjust your schedule on the fly.
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 88.7 miles from Round Rock, TX, or about 1h 33m into the drive.
The longest continuous stretch on this route runs about 111.1 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 39 miles or 41m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 88.7 miles or 1h 33m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 31m
Traffic, exits, and arrival timing usually matter more near Dallas, TX than in the middle of the route.
Before You Leave
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Open the route before leaving Round Rock, TX so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
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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 Round Rock, TX
This is one driving day of about 177.3 miles and 3h 5m.
Your first comfortable stop window is around 39 miles from Round Rock, 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 Purple Heart Trail for about 111.1 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 8
5 decision points cluster between mile 0.1 and 177 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.1 mi into trip|~0m in|West Liberty Avenue
Turn left onto West Liberty Avenue
Navigation decision point
5
0.2 mi into trip|~0m in|Round Rock Avenue
At end of road, turn right onto Round Rock Avenue
Navigation decision point
7
118.7 mi into trip|~2h 3m in|I 35E
Keep slight right at fork onto I 35E toward I 35E: Dallas
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 35E: Dallas
7
176.8 mi into trip|~3h 4m in
Take the exit toward Continental Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 429A
Toward Continental Avenue
6
177 mi into trip|~3h 4m in|Continental Avenue
Turn right onto Continental Avenue
Lane positioning matters here
Use the right lane.
Fuel & Cost
Regular Gas
$26.79 one way
$53.58 round trip
$3.84/gal25.4 MPG avg62 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$29.32
$58.65
premium
$4.54
$31.66
$63.31
diesel
$5.61
$39.15
$78.29
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$27
Meals
$25–$50
Total
$52–$77
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 62 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $19 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
53.2
0
$18.62
$8.51
Efficient EV
44.3
0
$15.51
$7.09
EV Truck/SUV
70.9
0
$24.82
$11.35
Gas CO2
62 kg
EV CO2
21 kg (66% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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 21, 2026
Origin
Round Rock, TX
Late night
in Round Rock on Tuesday
Local time
5:35 AM
CDT
Current temp
58°F
Showers And Thunderstorms
SE 5 mph83% chanceLive forecast
Flash Flood Warning
Flash Flood Warning issued April 20 at 8:46PM CDT until April 20 at 11:00PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued April 20 at 8:24PM CDT until April 22 at 10:26AM CDT by NWS Austin/San Antonio TX
Destination
Dallas, TX
Late night
in Dallas on Tuesday
Local time
5:35 AM
CDT
Current temp
56°F
Mostly Cloudy then Showers And Thunderstorms Likely
S 0 to 5 mph67% chanceLive forecast
Flash Flood Warning
Flash Flood Warning issued April 20 at 8:46PM CDT until April 20 at 11:00PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued April 20 at 8:24PM CDT until April 22 at 10:26AM CDT by NWS Austin/San Antonio 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
2 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
3h 5m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
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.
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 85.6
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This journey features a mixed drive profile, with 37% of the route utilizing highways. You'll experience an uninterrupted stretch of 111.1 miles on the Purple Heart Trail, which likely offers a different feel than the interstate portions. As you progress toward Dallas, the road character will shift, transitioning between potentially faster highway segments and local road sections. Expect a varied driving experience that keeps you engaged without being overly demanding.
37% highway, the rest on surface roads — varied driving throughout.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 111.1 mi on Purple Heart Trail.
How Hard Is This Drive?
5/10
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.1 miles in near West Liberty Avenue.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 177.3 miles you will encounter 8 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (West Liberty Avenue): Navigation decision point; at 0.2 miles (Round Rock Avenue): Navigation decision point; at 118.7 miles (I 35E): Highway fork - watch signs carefully. Lane positioning matters here.
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
Dallas, with a population of more than 1.3 million residents, is the ninth largest city in the United States and the third largest in the state of Texas. It is an impressive melting pot of culture and character. Boasting high-end luxury hotels, innumerable fine dining spots, and one of the busiest airports in the world, Dallas maintains an upscale ethos reflected by an affluent population, world-class museums, and a shimmering modern skyline. Its history was marred by the infamous assassination of U.S. President John F. Kennedy, but there is more historic and contemporary heritage to be discovered in the city.
As a center of the oil and cotton industries in the late 1800s and early 1900s, Dallas was a classic American boom town and remains one of the fastest growing cities in the nation.
Top landmarks
•Dallas Museum of Art — art museum in Dallas, Texas
•Texas School Book Depository — building in Dallas, Texas, United States
•George W. Bush Presidential Center — Presidential library and museum for U.S. President George W. Bush, located in Da...
Doable as a same-day drive at 3h 5m. Total distance: 177.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 5m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (37%). Some complex stretches to watch for.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 111.1 miles on Purple Heart Trail. 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 0.1 miles (West Liberty Avenue): Navigation decision point; at 0.2 miles (Round Rock Avenue): Navigation decision point; at 118.7 miles (I 35E): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Waco Mammoth National Monument. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.1 hours each way, an in-and-out day trip would put you behind the wheel for 6.2 hours — manageable with a long break at Dallas, TX, but most travelers stay overnight.
