Traveling from Eagle Mountain to San Antonio covers 306.2 miles and typically takes about 4 hours and 44 minutes of drive time. Because this journey fits comfortably into a single day, you won't need to worry about booking overnight accommodations unless you prefer a leisurely pace. Budgeting roughly $46 for fuel should cover your expenses for the trip. Both your starting point and destination sit within the Great Plains region of Texas, keeping the landscape consistent as you head south. This route works best as a straightforward one-day transit for those looking to reach San Antonio 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
141.2 miles from Eagle Mountain, TX
A natural place for your longest stop of the day
, about 2h 35m into the drive
.
Step-by-step road directions between Eagle Mountain, TX and San Antonio, TX.
1
Start on Timber Oaks Drive
0.1 mi·31 sec·Timber Oaks Drive
2
Turn left onto Cape Royale Drive
205 ft·11 sec·Cape Royale Drive
3
Turn right onto FM 1220
1.6 mi·2 min·Boat Club Road
4
Turn left onto West Bailey Boswell Road
2.3 mi·4 min·West Bailey Boswell Road
Use the left / straight lanes.
5
Keep slight right at fork onto West Bailey Boswell Road
0.2 mi·26 sec·West Bailey Boswell Road
6
Turn right onto US 287 Bus
2.7 mi·4 min·North Saginaw Boulevard
7
Turn left onto East Industrial Avenue
1.0 mi·2 min·East Industrial Avenue
Use the straight lane.
8
Turn right onto FM 156
0.4 mi·48 sec·South Blue Mound Road
9
Turn left onto Northeast Loop 820
0.1 mi·12 sec·Northeast Loop 820
Use the left lane.
10
Take the ramp
0.2 mi·23 sec
Toward I 820 East
11
Merge onto I 820
0.9 mi·1 min·Jim Wright Freeway
Use the straight / slight right lanes.
12
Take the exit
0.3 mi·31 sec
Exit 16BToward I 35W, US 287: Denton, Fort WorthUse the straight / slight right lanes.
13
Keep slight right at fork
0.9 mi·1 min
Toward I 35W South, US 287 South: Downtown, Fort WorthUse the slight right lane.
14
Merge onto I 35W; US 287
0.7 mi·47 sec·North Freeway
Use the straight / slight right lanes.
15
Take the exit
0.6 mi·33 sec
Toward I 35W Express Toll SouthUse the slight left lane.
16
Merge onto I 35W TEXpress
4.0 mi·3 min·I 35W TEXpress
Use the straight / slight right lanes.
17
Merge onto I 35W
85 mi·1 hr 27 min·North South Freeway
Use the straight / slight right lanes.
18
Continue on I 35; US 77
6.6 mi·7 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
19
Continue on I 35
38 mi·39 min·Purple Heart Trail
Use the straight / slight right lanes.
20
Keep slight left at fork onto I 35
56 mi·58 min·I 35
Use the straight / slight right lanes.
21
Keep slight left at fork onto I 35; US 290
50 mi·54 min·Purple Heart Trail
Toward 32nd Street, Dean Keeton StreetUse the slight left lane.
22
Continue on I 35
1.7 mi·1 min·Interstate Highway 35
Use the straight / slight right lanes.
23
Continue on I 35
12 mi·12 min·Purple Heart Trail
Use the straight / slight right lanes.
24
Continue on I 35
10.0 mi·11 min·North Pan Am Expressway
Use the straight / slight right lanes.
25
Keep slight left at fork onto I 35
6.4 mi·8 min·North Pan Am Expressway
Toward I 35 SouthUse the straight / slight right lanes.
26
Keep slight left at fork onto I 35
0.6 mi·41 sec·North Pan Am Expressway
Toward I 35 South: Lower Level, LaredoUse the slight left lane.
27
Take the exit
0.1 mi·16 sec
Exit 157AToward Lexington Avenue, Main Avenue, San Pedro AvenueUse the slight right lane.
28
Turn straight onto East Elmira Street
526 ft·17 sec·East Elmira Street
Use the left / straight lanes.
29
Turn left onto North Main Avenue
0.2 mi·18 sec·North Main Avenue
Use the left / straight lanes.
30
Enter roundabout onto Navarro Street
159 ft·3 sec·Navarro Street
31
Continue on Navarro Street
111 ft·2 sec·Navarro Street
32
Keep slight right at fork onto North Main Avenue
0.4 mi·51 sec·North Main Avenue
Use the slight left / slight right lanes.
33
Turn right onto West Travis Street
222 ft·10 sec·West Travis Street
34
Turn left onto North Flores Street
0.2 mi·20 sec·North Flores Street
35
Continue on Military Plaza
392 ft·15 sec·Military Plaza
36
Turn left onto Dolorosa Street
327 ft·8 sec·Dolorosa Street
37
Arrive at destination
Dolorosa Street
Trip Plan
Given the 4 hour and 44 minute duration, you have plenty of flexibility to plan your departure time around local traffic patterns. Since this is a non-highway route, keep in mind that your average speed may be lower than expected, so factor in extra time for the 306.2-mile distance. While there are no mandated stops scheduled, you should plan to pull over periodically to stretch your legs, especially given the turn-heavy nature of the local roads. Keep your $46 fuel budget handy and monitor your gauge closely, as local roads may offer fewer refueling options than major corridors. A helpful tip for this specific drive is to download your navigation maps ahead of time to ensure you stay on track through the complex series of local turns.
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 141.2 miles from Eagle Mountain, TX, or about 2h 35m into the drive.
The longest continuous stretch on this route runs about 99.6 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 62 miles or 1h 12m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 141.2 miles or 2h 35m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 11m
Traffic, exits, and arrival timing usually matter more near San Antonio, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Eagle Mountain, 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 Eagle Mountain, TX
This is one driving day of about 282.5 miles and 5h 10m.
Your first comfortable stop window is around 62 miles from Eagle Mountain, 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 99.6 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 28
5 decision points cluster between mile 9.5 and 281.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
9.5 mi into trip|~17m in
Take the exit toward I 35W, US 287: Denton, 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 16B
Toward I 35W, US 287: Denton, Fort Worth
8
9.8 mi into trip|~18m in
Keep slight right at fork toward I 35W South, US 287 South: Downtown, Fort Worth
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 35W South, US 287 South: Downtown, For...
8
200.9 mi into trip|~3h 38m 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
8
280.8 mi into trip|~5h 7m 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
281.3 mi into trip|~5h 7m 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...
Fuel & Cost
Regular Gas
$42.69 one way
$85.37 round trip
$3.84/gal25.4 MPG avg99 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$46.72
$93.45
premium
$4.54
$50.44
$100.88
diesel
$5.61
$62.37
$124.74
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$43
Meals
$25–$50
Total
$68–$93
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 98.8 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $30 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
84.8
1
$29.66
$13.56
Efficient EV
70.6
0
$24.72
$11.30
EV Truck/SUV
113
1
$39.55
$18.08
Gas CO2
99 kg
EV CO2
33 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 20, 2026
Origin
Eagle Mountain, TX
Late night
in Eagle Mountain on Tuesday
Local time
4:41 AM
CDT
Current temp
64°F
Unavailable
Live forecast
Destination
San Antonio, TX
Late night
in San Antonio on Tuesday
Local time
4:41 AM
CDT
Current temp
70°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
6 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
5h 10m 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.
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...
5 mi from route
~13 min detour
Free
near mile 97.4
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...
9 mi from route
~22 min detour
Free
near mile 282.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a turn-heavy local drive rather than a straightforward interstate cruise, as this route lacks significant highway travel. You will navigate a series of local roads that demand more active attention than a typical highway grind. With a 0% highway share, the character of the road remains consistent throughout the entire 306.2-mile journey. Since there are no major interstates to lean on, you should prepare for a more technical driving experience that keeps you engaged behind the wheel. The lack of long, uninterrupted stretches means you will experience a steady, winding pace until you reach your destination.
61% highway — fuel and pacing are the main things to plan.
37 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 99.6 mi on Purple Heart Trail.
How Hard Is This Drive?
10/10
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 9.5 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 28 significant decision points across 282.5 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 9.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 9.8 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 200.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
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.
Top landmarks
•Alamo Mission in San Antonio — historic place in San Antonio, Bexar County, Texas
•San Antonio Missions National Historical Park — historic district in San Antonio, Bexar County, Texas
•Fort Sam Houston — military base in San Antonio, Texas
Doable as a same-day drive at 5h 10m. Total distance: 282.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 10m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 99.6 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.
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 San Antonio, 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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 9.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 9.8 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 200.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Waco Mammoth National Monument and San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.2 hours each way, a round trip means 10.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at San Antonio, TX before the return drive.
